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<link:definition>014 - Disclosure - Investment Securities</link:definition>
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<link:definition>021 - Disclosure - Federal Home Loan Bank Advances</link:definition>
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<link:definition>022 - Disclosure - Long-term Debt</link:definition>
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<link:definition>024 - Disclosure - Earnings Per Share</link:definition>
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<link:definition>025 - Disclosure - Income Taxes</link:definition>
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<link:definition>026 - Disclosure - Pension and Employee Benefit Plans</link:definition>
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<link:definition>027 - Disclosure - Derivatives and Hedging Activities</link:definition>
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<link:definition>028 - Disclosure - Regulatory Matters</link:definition>
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<link:definition>029 - Disclosure - Commitments and Contingencies</link:definition>
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<link:definition>030 - Disclosure - Common and Preferred Stock</link:definition>
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<link:definition>031 - Disclosure - Equity Compensation and Related Plans</link:definition>
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<link:definition>032 - Disclosure - Assets and Liabilities Measured at Fair Value</link:definition>
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<link:usedOn>link:definitionLink</link:usedOn>
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<link:definition>033 - Disclosure - Condensed Financial Statements of United Community Banks, Inc. (Parent Only)</link:definition>
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<link:definition>035 - Disclosure - Summary of Significant Accounting Policies (Policies)</link:definition>
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<link:definition>036 - Disclosure - Mergers and Acquisitions (Tables)</link:definition>
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<link:definition>037 - Disclosure - Balance Sheet Offsetting and Repurchase Agreements Accounted for as Secured Borrowings (Tables)</link:definition>
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<link:definition>038 - Disclosure - Investment Securities (Tables)</link:definition>
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<link:definition>039 - Disclosure - Loans and Allowance for Credit Losses (Tables)</link:definition>
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<link:definition>040 - Disclosure - Premises and Equipment (Tables)</link:definition>
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<link:definition>041 - Disclosure - Goodwill and Other Intangible Assets (Tables)</link:definition>
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<link:definition>042 - Disclosure - Foreclosed Property (Tables)</link:definition>
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<link:definition>043 - Disclosure - Servicing Rights (Tables)</link:definition>
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<link:definition>044 - Disclosure - Deposits (Tables)</link:definition>
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<link:definition>045 - Disclosure - Federal Home Loan Bank Advances (Tables)</link:definition>
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<link:definition>046 - Disclosure - Long-term Debt (Tables)</link:definition>
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<link:definition>047 - Disclosure - Reclassifications Out of Accumulated Other Comprehensive Income (Tables)</link:definition>
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<link:definition>048 - Disclosure - Earnings Per Share (Tables)</link:definition>
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<link:definition>049 - Disclosure - Income Taxes (Tables)</link:definition>
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<link:definition>050 - Disclosure - Pension and Employee Benefit Plans (Tables)</link:definition>
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<link:usedOn>link:definitionLink</link:usedOn>
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<link:definition>051 - Disclosure - Derivatives and Hedging Activities (Tables)</link:definition>
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<link:definition>052 - Disclosure - Regulatory Matters (Tables)</link:definition>
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<link:definition>053 - Disclosure - Commitments and Contingencies (Tables)</link:definition>
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<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
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<link:roleType roleURI="http://ucbi.com/role/EquityCompensationAndRelatedPlansTables" id="EquityCompensationAndRelatedPlansTables">
<link:definition>054 - Disclosure - Equity Compensation and Related Plans (Tables)</link:definition>
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<link:usedOn>link:definitionLink</link:usedOn>
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<link:roleType roleURI="http://ucbi.com/role/AssetsAndLiabilitiesMeasuredAtFairValuetables" id="AssetsAndLiabilitiesMeasuredAtFairValuetables">
<link:definition>055 - Disclosure - Assets and Liabilities Measured at Fair Value (Tables)</link:definition>
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<link:usedOn>link:definitionLink</link:usedOn>
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<link:roleType roleURI="http://ucbi.com/role/CondensedFinancialStatementsOfUnitedCommunityBanksIncParentOnlyTables" id="CondensedFinancialStatementsOfUnitedCommunityBanksIncParentOnlyTables">
<link:definition>056 - Disclosure - Condensed Financial Statements of United Community Banks Inc. (Parent Only) (Tables)</link:definition>
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<link:usedOn>link:definitionLink</link:usedOn>
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<link:definition>057 - Disclosure - Summary of Significant Accounting Policies (Detail Textuals)</link:definition>
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<link:definition>058 - Disclosure - Accounting Standards Updates (Detail Textuals)</link:definition>
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<link:definition>059 - Disclosure - Mergers and Acquisitions (Details)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
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<link:definition>060 - Disclosure - Mergers and Acquisitions (Parentheticals) (Details)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
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<link:roleType roleURI="http://ucbi.com/role/MergersAndAcquisitionsDetails1" id="MergersAndAcquisitionsDetails1">
<link:definition>061 - Disclosure - Mergers and Acquisitions (Details 1)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://ucbi.com/role/MergersAndAcquisitionsDetails2" id="MergersAndAcquisitionsDetails2">
<link:definition>062 - Disclosure - Mergers and Acquisitions (Details 2)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://ucbi.com/role/MergersAndAcquisitionsParentheticalsDetails2" id="MergersAndAcquisitionsParentheticalsDetails2">
<link:definition>063 - Disclosure - Mergers and Acquisitions (Parentheticals) (Details 2)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://ucbi.com/role/MergersAndAcquisitionsDetails3" id="MergersAndAcquisitionsDetails3">
<link:definition>064 - Disclosure - Mergers and Acquisitions (Details 3)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://ucbi.com/role/MergersAndAcquisitionsDetails4" id="MergersAndAcquisitionsDetails4">
<link:definition>065 - Disclosure - Mergers and Acquisitions (Details 4)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://ucbi.com/role/MergersAndAcquisitionsDetails5" id="MergersAndAcquisitionsDetails5">
<link:definition>066 - Disclosure - Mergers and Acquisitions (Details 5)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://ucbi.com/role/MergersAndAcquisitionsDetails6" id="MergersAndAcquisitionsDetails6">
<link:definition>067 - Disclosure - Mergers and Acquisitions (Details 6)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://ucbi.com/role/MergersAndAcquisitionsParentheticalsDetails6" id="MergersAndAcquisitionsParentheticalsDetails6">
<link:definition>068 - Disclosure - Mergers and Acquisitions (Parentheticals) (Details 6)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://ucbi.com/role/MergersAndAcquisitionsDetails7" id="MergersAndAcquisitionsDetails7">
<link:definition>069 - Disclosure - Mergers and Acquisitions (Details 7)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://ucbi.com/role/MergersAndAcquisitionsDetails8" id="MergersAndAcquisitionsDetails8">
<link:definition>070 - Disclosure - Mergers and Acquisitions (Details 8)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://ucbi.com/role/MergersAndAcquisitionsParentheticalsDetails8" id="MergersAndAcquisitionsParentheticalsDetails8">
<link:definition>071 - Disclosure - Mergers and Acquisitions (Parentheticals) (Details 8)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://ucbi.com/role/MergersAndAcquisitionsDetails9" id="MergersAndAcquisitionsDetails9">
<link:definition>072 - Disclosure - Mergers and Acquisitions (Details 9)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://ucbi.com/role/MergersAndAcquisitionsDetails10" id="MergersAndAcquisitionsDetails10">
<link:definition>073 - Disclosure - Mergers and Acquisitions (Details 10)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://ucbi.com/role/Mergersandacquisitionsdetailtextuals" id="Mergersandacquisitionsdetailtextuals">
<link:definition>074 - Disclosure - Mergers and Acquisitions (Detail Textuals)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://ucbi.com/role/CashFlowsDetailTextuals" id="CashFlowsDetailTextuals">
<link:definition>075 - Disclosure - Cash Flows (Detail Textuals)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://ucbi.com/role/BalanceSheetOffsettingAndRepurchaseAgreementsAccountedForAsSecuredBorrowingsDetails" id="BalanceSheetOffsettingAndRepurchaseAgreementsAccountedForAsSecuredBorrowingsDetails">
<link:definition>076 - Disclosure - Balance Sheet Offsetting and Repurchase Agreements Accounted for as Secured Borrowings (Details)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://ucbi.com/role/BalanceSheetOffsettingAndRepurchaseAgreementsAccountedForAsSecuredBorrowingsDetails1" id="BalanceSheetOffsettingAndRepurchaseAgreementsAccountedForAsSecuredBorrowingsDetails1">
<link:definition>077 - Disclosure - Balance Sheet Offsetting and Repurchase Agreements Accounted for as Secured Borrowings (Details 1)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://ucbi.com/role/BalanceSheetOffsettingAndRepurchaseAgreementsAccountedForAsSecuredBorrowingsDetailTextuals" id="BalanceSheetOffsettingAndRepurchaseAgreementsAccountedForAsSecuredBorrowingsDetailTextuals">
<link:definition>078 - Disclosure - Balance Sheet Offsetting and Repurchase Agreements Accounted for as Secured Borrowings (Detail Textuals)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://ucbi.com/role/InvestmentSecuritiesDetails" id="InvestmentSecuritiesDetails">
<link:definition>079 - Disclosure - Investment Securities (Details)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://ucbi.com/role/InvestmentSecuritiesDetails1" id="InvestmentSecuritiesDetails1">
<link:definition>080 - Disclosure - Investment Securities (Details 1)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://ucbi.com/role/InvestmentSecuritiesDetails5" id="InvestmentSecuritiesDetails5">
<link:definition>081 - Disclosure - Investment Securities (Details 2)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://ucbi.com/role/InvestmentSecuritiesDetails2" id="InvestmentSecuritiesDetails2">
<link:definition>082 - Disclosure - Investment Securities (Details 3)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://ucbi.com/role/InvestmentSecuritiesDetails3" id="InvestmentSecuritiesDetails3">
<link:definition>083 - Disclosure - Investment Securities (Details 4)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://ucbi.com/role/InvestmentSecuritiesDetails4" id="InvestmentSecuritiesDetails4">
<link:definition>084 - Disclosure - Investment Securities (Details 5)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://ucbi.com/role/InvestmentSecuritiesDetailTextuals" id="InvestmentSecuritiesDetailTextuals">
<link:definition>085 - Disclosure - Investment Securities (Detail Textuals)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://ucbi.com/role/LoansAndAllowanceForCreditLossesDetails" id="LoansAndAllowanceForCreditLossesDetails">
<link:definition>086 - Disclosure - Loans and Allowance for Credit Losses (Details)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://ucbi.com/role/LoansAndAllowanceForCreditLossesDetails1" id="LoansAndAllowanceForCreditLossesDetails1">
<link:definition>087 - Disclosure - Loans and Allowance for Credit Losses (Details 1)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://ucbi.com/role/LoansAndAllowanceForCreditLossesDetails2" id="LoansAndAllowanceForCreditLossesDetails2">
<link:definition>088 - Disclosure - Loans and Allowance for Credit Losses (Details 2)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://ucbi.com/role/LoansAndAllowanceForCreditLossesDetails3" id="LoansAndAllowanceForCreditLossesDetails3">
<link:definition>089 - Disclosure - Loans and Allowance for Credit Losses (Details 3)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://ucbi.com/role/Loansandallowanceforcreditlossesdetails4" id="Loansandallowanceforcreditlossesdetails4">
<link:definition>090 - Disclosure - Loans and Allowance for Credit Losses (Details 4)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://ucbi.com/role/LoansAndAllowanceForCreditLossesDetails5" id="LoansAndAllowanceForCreditLossesDetails5">
<link:definition>091 - Disclosure - Loans and Allowance for Credit Losses (Details 5)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://ucbi.com/role/LoansAndAllowanceForCreditLossesDetails6" id="LoansAndAllowanceForCreditLossesDetails6">
<link:definition>092 - Disclosure - Loans and Allowance for Credit Losses (Details 6)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://ucbi.com/role/LoansAndAllowanceForCreditLossesDetails7" id="LoansAndAllowanceForCreditLossesDetails7">
<link:definition>093 - Disclosure - Loans and Allowance for Credit Losses (Details 7)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://ucbi.com/role/LoansAndAllowanceForCreditLossesDetails8" id="LoansAndAllowanceForCreditLossesDetails8">
<link:definition>094 - Disclosure - Loans and Allowance for Credit Losses (Details 8)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://ucbi.com/role/LoansAndAllowanceForCreditLossesDetails9" id="LoansAndAllowanceForCreditLossesDetails9">
<link:definition>095 - Disclosure - Loans and Allowance for Credit Losses (Details 9)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://ucbi.com/role/LoansAndAllowanceForCreditLossesDetails10" id="LoansAndAllowanceForCreditLossesDetails10">
<link:definition>096 - Disclosure - Loans and Allowance for Credit Losses (Details 10)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://ucbi.com/role/LoansAndAllowanceForCreditLossesDetailTextuals" id="LoansAndAllowanceForCreditLossesDetailTextuals">
<link:definition>097 - Disclosure - Loans and Allowance for Credit Losses (Detail Textuals)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://ucbi.com/role/PremisesAndEquipmentDetails" id="PremisesAndEquipmentDetails">
<link:definition>098 - Disclosure - Premises and Equipment (Details)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://ucbi.com/role/PremisesAndEquipmentDetails1" id="PremisesAndEquipmentDetails1">
<link:definition>099 - Disclosure - Premises and Equipment (Details 1)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://ucbi.com/role/PremisesAndEquipmentDetailTextuals" id="PremisesAndEquipmentDetailTextuals">
<link:definition>100 - Disclosure - Premises and Equipment (Detail Textuals)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://ucbi.com/role/GoodwillAndOtherIntangibleAssetsDetails" id="GoodwillAndOtherIntangibleAssetsDetails">
<link:definition>101 - Disclosure - Goodwill and Other Intangible Assets (Details)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://ucbi.com/role/GoodwillAndOtherIntangibleAssetsDetails1" id="GoodwillAndOtherIntangibleAssetsDetails1">
<link:definition>102 - Disclosure - Goodwill and Other Intangible Assets (Details 1)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://ucbi.com/role/GoodwillandOtherIntangibleAssetsDetails2" id="GoodwillandOtherIntangibleAssetsDetails2">
<link:definition>103 - Disclosure - Goodwill and Other Intangible Assets (Details 2)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://ucbi.com/role/ForeclosedPropertyDetails" id="ForeclosedPropertyDetails">
<link:definition>104 - Disclosure - Foreclosed Property (Details)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://ucbi.com/role/ServicingRightsDetails" id="ServicingRightsDetails">
<link:definition>105 - Disclosure - Servicing Rights (Details)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://ucbi.com/role/ServicingRightsDetails1" id="ServicingRightsDetails1">
<link:definition>106 - Disclosure - Servicing Rights (Details 1)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://ucbi.com/role/ServicingRightsDetails2" id="ServicingRightsDetails2">
<link:definition>107 - Disclosure - Servicing Rights (Details 2)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://ucbi.com/role/ServicingRightsDetails3" id="ServicingRightsDetails3">
<link:definition>108 - Disclosure - Servicing Rights (Details 3)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://ucbi.com/role/ServicingRightsDetails4" id="ServicingRightsDetails4">
<link:definition>109 - Disclosure - Servicing Rights (Details 4)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://ucbi.com/role/ServicingRightsDetailTextuals" id="ServicingRightsDetailTextuals">
<link:definition>110 - Disclosure - Servicing Rights (Detail Textuals)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://ucbi.com/role/DepositsDetails" id="DepositsDetails">
<link:definition>111 - Disclosure - Deposits (Details)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://ucbi.com/role/DepositsDetailsTextual" id="DepositsDetailsTextual">
<link:definition>112 - Disclosure - Deposits (Detail Textuals)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://ucbi.com/role/FederalHomeLoanBankAdvancesDetails" id="FederalHomeLoanBankAdvancesDetails">
<link:definition>113 - Disclosure - Federal Home Loan Bank Advances (Details)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://ucbi.com/role/FederalHomeLoanBankAdvancesDetailTextuals" id="FederalHomeLoanBankAdvancesDetailTextuals">
<link:definition>114 - Disclosure - Federal Home Loan Bank Advances (Detail Textuals)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://ucbi.com/role/LongTermDebtDetails" id="LongTermDebtDetails">
<link:definition>115 - Disclosure - Long-term Debt (Details)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://ucbi.com/role/LongTermDebtDetailsTextual" id="LongTermDebtDetailsTextual">
<link:definition>116 - Disclosure - Long-term Debt (Detail Textuals)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://ucbi.com/role/ReclassificationsOutofAccumulatedOtherComprehensiveIncomeDetails" id="ReclassificationsOutofAccumulatedOtherComprehensiveIncomeDetails">
<link:definition>117 - Disclosure - Reclassifications Out of Accumulated Other Comprehensive Income (Details)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://ucbi.com/role/EarningsPerShareDetails" id="EarningsPerShareDetails">
<link:definition>118 - Disclosure - Earnings Per Share (Details)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://ucbi.com/role/EarningsPerShareDetailsTextual" id="EarningsPerShareDetailsTextual">
<link:definition>119 - Disclosure - Earnings Per Share (Detail Textuals)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://ucbi.com/role/IncomeTaxesDetails" id="IncomeTaxesDetails">
<link:definition>120 - Disclosure - Income Taxes (Details)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://ucbi.com/role/IncomeTaxesDetails1" id="IncomeTaxesDetails1">
<link:definition>121 - Disclosure - Income Taxes (Details 1)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://ucbi.com/role/IncomeTaxesDetails2" id="IncomeTaxesDetails2">
<link:definition>122 - Disclosure - Income Taxes (Details 2)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://ucbi.com/role/IncomeTaxesDetails3" id="IncomeTaxesDetails3">
<link:definition>123 - Disclosure - Income Taxes (Details 3)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
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<link:roleType roleURI="http://ucbi.com/role/IncomeTaxesDetailTextuals" id="IncomeTaxesDetailTextuals">
<link:definition>124 - Disclosure - Income Taxes (Detail Textuals)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
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<link:roleType roleURI="http://ucbi.com/role/PensionAndEmployeeBenefitPlansDetails" id="PensionAndEmployeeBenefitPlansDetails">
<link:definition>125 - Disclosure - Pension and Employee Benefit Plans (Details)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
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<link:roleType roleURI="http://ucbi.com/role/PensionAndEmployeeBenefitPlansDetails1" id="PensionAndEmployeeBenefitPlansDetails1">
<link:definition>126 - Disclosure - Pension and Employee Benefit Plans (Details 1)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
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<link:roleType roleURI="http://ucbi.com/role/PensionAndEmployeeBenefitPlansDetails2" id="PensionAndEmployeeBenefitPlansDetails2">
<link:definition>127 - Disclosure - Pension and Employee Benefit Plans (Details 2)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
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<link:roleType roleURI="http://ucbi.com/role/PensionAndEmployeeBenefitPlansDetails3" id="PensionAndEmployeeBenefitPlansDetails3">
<link:definition>128 - Disclosure - Pension and Employee Benefit Plans (Details 3)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://ucbi.com/role/PensionAndEmployeeBenefitPlansDetails4" id="PensionAndEmployeeBenefitPlansDetails4">
<link:definition>129 - Disclosure - Pension and Employee Benefit Plans (Details 4)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://ucbi.com/role/PensionAndEmployeeBenefitPlansDetailTextuals" id="PensionAndEmployeeBenefitPlansDetailTextuals">
<link:definition>130 - Disclosure - Pension and Employee Benefit Plans (Detail Textuals)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://ucbi.com/role/DerivativesAndHedgingActivitiesDetails" id="DerivativesAndHedgingActivitiesDetails">
<link:definition>131 - Disclosure - Derivatives and Hedging Activities (Details)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://ucbi.com/role/DerivativesAndHedgingActivitiesDetails1" id="DerivativesAndHedgingActivitiesDetails1">
<link:definition>132 - Disclosure - Derivatives and Hedging Activities (Details 1)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://ucbi.com/role/DerivativesAndHedgingActivitiesDetails2" id="DerivativesAndHedgingActivitiesDetails2">
<link:definition>133 - Disclosure - Derivatives and Hedging Activities (Details 2)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://ucbi.com/role/DerivativesAndHedgingActivitiesDetails3" id="DerivativesAndHedgingActivitiesDetails3">
<link:definition>134 - Disclosure - Derivatives and Hedging Activities (Details 3)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://ucbi.com/role/DerivativesAndHedgingActivitiesDetails4" id="DerivativesAndHedgingActivitiesDetails4">
<link:definition>135 - Disclosure - Derivatives and Hedging Activities (Details 4)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://ucbi.com/role/DerivativesAndHedgingActivitiesDetailTextuals" id="DerivativesAndHedgingActivitiesDetailTextuals">
<link:definition>136 - Disclosure - Derivatives and Hedging Activities (Detail Textuals)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://ucbi.com/role/RegulatoryMattersDetails" id="RegulatoryMattersDetails">
<link:definition>137 - Disclosure - Regulatory Matters (Details)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://ucbi.com/role/RegulatoryMattersDetailsTextual" id="RegulatoryMattersDetailsTextual">
<link:definition>138 - Disclosure - Regulatory Matters (Detail Textuals)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
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<link:roleType roleURI="http://ucbi.com/role/CommitmentsAndContingenciesDetails" id="CommitmentsAndContingenciesDetails">
<link:definition>139 - Disclosure - Commitments and Contingencies (Details)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
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<link:roleType roleURI="http://ucbi.com/role/CommitmentsAndContingenciesDetailTextuals" id="CommitmentsAndContingenciesDetailTextuals">
<link:definition>140 - Disclosure - Commitments and Contingencies (Detail Textuals)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
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<link:roleType roleURI="http://ucbi.com/role/CommonAndPreferredStockDetailTextuals" id="CommonAndPreferredStockDetailTextuals">
<link:definition>141 - Disclosure - Common and Preferred Stock (Detail Textuals)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
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<link:roleType roleURI="http://ucbi.com/role/EquityCompensationAndRelatedPlansDetails" id="EquityCompensationAndRelatedPlansDetails">
<link:definition>142 - Disclosure - Equity Compensation and Related Plans (Details)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
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<link:roleType roleURI="http://ucbi.com/role/Equitycompensationandrelatedplansdetails1" id="Equitycompensationandrelatedplansdetails1">
<link:definition>143 - Disclosure - Equity Compensation and Related Plans (Details 1)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
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<link:roleType roleURI="http://ucbi.com/role/EquityCompensationAndRelatedPlansDetailTextuals" id="EquityCompensationAndRelatedPlansDetailTextuals">
<link:definition>144 - Disclosure - Equity Compensation and Related Plans (Detail Textuals)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
</link:roleType>
<link:roleType roleURI="http://ucbi.com/role/AssetsAndLiabilitiesMeasuredAtFairValueDetails" id="AssetsAndLiabilitiesMeasuredAtFairValueDetails">
<link:definition>145 - Disclosure - Assets and Liabilities Measured at Fair Value (Details)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
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<link:roleType roleURI="http://ucbi.com/role/AssetsAndLiabilitiesMeasuredAtFairValueDetails1" id="AssetsAndLiabilitiesMeasuredAtFairValueDetails1">
<link:definition>146 - Disclosure - Assets and Liabilities Measured at Fair Value (Details 1)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
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<link:roleType roleURI="http://ucbi.com/role/AssetsAndLiabilitiesMeasuredAtFairValueDetails2" id="AssetsAndLiabilitiesMeasuredAtFairValueDetails2">
<link:definition>147 - Disclosure - Assets and Liabilities Measured at Fair Value (Details 2)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
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<link:roleType roleURI="http://ucbi.com/role/AssetsAndLiabilitiesMeasuredAtFairValueDetails3" id="AssetsAndLiabilitiesMeasuredAtFairValueDetails3">
<link:definition>148 - Disclosure - Assets and Liabilities Measured at Fair Value (Details 3)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
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<link:roleType roleURI="http://ucbi.com/role/AssetsAndLiabilitiesMeasuredAtFairValueDetails4" id="AssetsAndLiabilitiesMeasuredAtFairValueDetails4">
<link:definition>149 - Disclosure - Assets and Liabilities Measured at Fair Value (Details 4)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
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<link:roleType roleURI="http://ucbi.com/role/AssetsAndLiabilitiesMeasuredAtFairValueDetailTextuals" id="AssetsAndLiabilitiesMeasuredAtFairValueDetailTextuals">
<link:definition>150 - Disclosure - Assets and Liabilities Measured at Fair Value (Detail Textuals)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
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<link:roleType roleURI="http://ucbi.com/role/FinancialStatementsOfParentOnlyDetails" id="FinancialStatementsOfParentOnlyDetails">
<link:definition>151 - Disclosure - Condensed Financial Statements of United Community Banks Inc. (Parent Only) (Details)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
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<link:roleType roleURI="http://ucbi.com/role/FinancialStatementsOfParentOnlyDetails1" id="FinancialStatementsOfParentOnlyDetails1">
<link:definition>152 - Disclosure - Condensed Financial Statements of United Community Banks Inc. (Parent Only) (Details 1)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
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<link:roleType roleURI="http://ucbi.com/role/FinancialStatementsOfUnitedCommunityBanksIncParentOnlyDetails2" id="FinancialStatementsOfUnitedCommunityBanksIncParentOnlyDetails2">
<link:definition>153 - Disclosure - Condensed Financial Statements of United Community Banks Inc. (Parent Only) (Details 2)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
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<link:roleType roleURI="http://ucbi.com/role/SubsequentEventsDetailTextuals" id="SubsequentEventsDetailTextuals">
<link:definition>154 - Disclosure - Subsequent Events (Detail Textuals)</link:definition>
<link:usedOn>link:presentationLink</link:usedOn>
<link:usedOn>link:definitionLink</link:usedOn>
<link:usedOn>link:calculationLink</link:usedOn>
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<link:linkbaseRef xlink:type="simple" xlink:href="ucbi-20171231_def.xml" xlink:role="http://www.xbrl.org/2003/role/definitionLinkbaseRef" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase"/>
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<element name="PreferredStockIssuedForAcquisitions" id="ucbi_PreferredStockIssuedForAcquisitions" type="xbrli:sharesItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
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<element name="IncreaseDecreaseInOtherAssetsAndAccruedInterestReceivable" id="ucbi_IncreaseDecreaseInOtherAssetsAndAccruedInterestReceivable" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item"/>
<element name="InvestmentSecuritiesHeldToMaturityAbstract" id="ucbi_InvestmentSecuritiesHeldToMaturityAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>

<element name="ProceedsFromIssuanceOfCommonStockForDividendReinvestmentAndEmployeeBenefitPlans" id="ucbi_ProceedsFromIssuanceOfCommonStockForDividendReinvestmentAndEmployeeBenefitPlans" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item"/>
<element name="BalanceSheetOffsettingAndRepurchaseAgreementsAccountedForAsSecuredBorrowingsTextBlock" id="ucbi_BalanceSheetOffsettingAndRepurchaseAgreementsAccountedForAsSecuredBorrowingsTextBlock" type="nonnum:textBlockItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
<element name="ReclassificationsOutOfAccumulatedOtherComprehensiveIncomeAbstract" id="ucbi_ReclassificationsOutOfAccumulatedOtherComprehensiveIncomeAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
<element name="BankOwnedLifeInsurancePolicyTextBlock" id="ucbi_BankOwnedLifeInsurancePolicyTextBlock" type="nonnum:textBlockItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
<element name="DividendRestrictionsPolicyTextBlock" id="ucbi_DividendRestrictionsPolicyTextBlock" type="nonnum:textBlockItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
<element name="FourOaksFincorpIncMember" id="ucbi_FourOaksFincorpIncMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
<element name="TidelandsBancsharesIncMember" id="ucbi_TidelandsBancsharesIncMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
<element name="PalmettoBankMember" id="ucbi_PalmettoBankMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
<element name="MoneyTreeCorporationMember" id="ucbi_MoneyTreeCorporationMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
<element name="HcsbFinancialCorporationMember" id="ucbi_HcsbFinancialCorporationMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
<element name="AdditionalInformationRelatedToAcquiredLoanTableTextBlock" id="ucbi_AdditionalInformationRelatedToAcquiredLoanTableTextBlock" type="nonnum:textBlockItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
<element name="ScheduleOfRepurchaseAgreementsRemainingContractualMaturityOfAgreementsTableTextBlock" id="ucbi_ScheduleOfRepurchaseAgreementsRemainingContractualMaturityOfAgreementsTableTextBlock" type="nonnum:textBlockItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
<element name="UnrealizedGainLossOnHeldToMaturitySecuritiesTableTextBlock" id="ucbi_UnrealizedGainLossOnHeldToMaturitySecuritiesTableTextBlock" type="nonnum:textBlockItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
<element name="ScheduleOfChangesInValueOfAccretableYieldForAcquiredLoansTableTextBlock" id="ucbi_ScheduleOfChangesInValueOfAccretableYieldForAcquiredLoansTableTextBlock" type="nonnum:textBlockItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
<element name="ScheduleOfLoansAndLeasesReceivableRelatedPartiesTableTextBlock" id="ucbi_ScheduleOfLoansAndLeasesReceivableRelatedPartiesTableTextBlock" type="nonnum:textBlockItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
<element name="AverageBalancesOfImpairedLoansAndIncomeRecognizedOnImpairedLoansTableTextBlock" id="ucbi_AverageBalancesOfImpairedLoansAndIncomeRecognizedOnImpairedLoansTableTextBlock" type="nonnum:textBlockItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
<element name="ScheduleOfClassificationsOfForeclosedPropertiesTableTextBlock" id="ucbi_ScheduleOfClassificationsOfForeclosedPropertiesTableTextBlock" type="nonnum:textBlockItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
<element name="AccountingPoliciesTable" id="ucbi_AccountingPoliciesTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem"/>
<element name="AccountingPoliciesLineItems" id="ucbi_AccountingPoliciesLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
<element name="PercentageThresholdLimitOfRevenue" id="ucbi_PercentageThresholdLimitOfRevenue" type="num:percentItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
<element name="MinimumNonaccrualLoanAmountNeededForEvaluationOfSpecificReserves" id="ucbi_MinimumNonaccrualLoanAmountNeededForEvaluationOfSpecificReserves" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item"/>

<element name="FutureFederalStatutoryIncomeTaxRate" id="ucbi_FutureFederalStatutoryIncomeTaxRate" type="num:percentItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
<element name="FairValueOfPurchasedAssetsAndAssumedLiabilitiesRecordedAxis" id="ucbi_FairValueOfPurchasedAssetsAndAssumedLiabilitiesRecordedAxis" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:dimensionItem"/>
<element name="FairValueOfPurchasedAssetsAndAssumedLiabilitiesRecordedDomain" id="ucbi_FairValueOfPurchasedAssetsAndAssumedLiabilitiesRecordedDomain" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
<element name="AsRecordedByFourOaksFinCorpIncMember" id="ucbi_AsRecordedByFourOaksFinCorpIncMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
<element name="FairValueAdjustmentsTidelandsMember" id="ucbi_FairValueAdjustmentsTidelandsMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
<element name="AsRecordedByUnitedMember" id="ucbi_AsRecordedByUnitedMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
<element name="FourOaksBankMember" id="ucbi_FourOaksBankMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
<element name="BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLoansHeldForSale" id="ucbi_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLoansHeldForSale" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item"/>
<element name="BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedBankOwnedLifeInsurance" id="ucbi_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedBankOwnedLifeInsurance" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item"/>
<element name="BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherRealEstateOwned" id="ucbi_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherRealEstateOwned" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item"/>
<element name="BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeposits" id="ucbi_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeposits" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item"/>
<element name="BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedRepurchaseAgreements" id="ucbi_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedRepurchaseAgreements" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item"/>
<element name="BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedFederalHomeLoanBankAdvances" id="ucbi_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedFederalHomeLoanBankAdvances" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item"/>
<element name="BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedExcessOfAssetsAcquiredOverLiabilitiesAssumed" id="ucbi_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedExcessOfAssetsAcquiredOverLiabilitiesAssumed" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item"/>
<element name="AggregateFairValueAdjustments" id="ucbi_AggregateFairValueAdjustments" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item"/>
<element name="BusinessAcquisitionCashPaymentToRedeemCommonStock" id="ucbi_BusinessAcquisitionCashPaymentToRedeemCommonStock" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item"/>
<element name="BusinessAcquisitionCashPaymentToRedeemPreferredStock" id="ucbi_BusinessAcquisitionCashPaymentToRedeemPreferredStock" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item"/>
<element name="AcquiredLoanPortfolioAxis" id="ucbi_AcquiredLoanPortfolioAxis" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:dimensionItem"/>
<element name="AcquiredLoanPortfolioDomain" id="ucbi_AcquiredLoanPortfolioDomain" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
<element name="AccountedForPursuantToAsc31030Member" id="ucbi_AccountedForPursuantToAsc31030Member" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
<element name="ExcludedFromAsc31030Member" id="ucbi_ExcludedFromAsc31030Member" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
<element name="HorryCountyStateBankMember" id="ucbi_HorryCountyStateBankMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
<element name="AsRecordedByHorryCountyStateBankMember" id="ucbi_AsRecordedByHorryCountyStateBankMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
<element name="FairValueAdjustmentsMember" id="ucbi_FairValueAdjustmentsMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
<element name="PalmettoBancsharesIncMember" id="ucbi_PalmettoBancsharesIncMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
<element name="AsRecordedByTidelandsBancsharesIncMember" id="ucbi_AsRecordedByTidelandsBancsharesIncMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
<element name="TidelandsBankMember" id="ucbi_TidelandsBankMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
<element name="AsRecordedByPalmettoBancsharesIncMember" id="ucbi_AsRecordedByPalmettoBancsharesIncMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
<element name="BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedShortTermBorrowings" id="ucbi_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedShortTermBorrowings" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item"/>
<element name="FirstNationalBankMember" id="ucbi_FirstNationalBankMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
<element name="AsRecordedByMoneyTreeMember" id="ucbi_AsRecordedByMoneyTreeMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
<element name="BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedSblfPreferredStockAssumed" id="ucbi_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedSblfPreferredStockAssumed" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item"/>

<element name="DepositPremiumMember" id="ucbi_DepositPremiumMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
<element name="TrustPreferredSecuritiesMember" id="ucbi_TrustPreferredSecuritiesMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
<element name="NumberOfBranches" id="ucbi_NumberOfBranches" type="xbrli:integerItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
<element name="BusinessCombinationPreferredStockLiabilityAssumed" id="ucbi_BusinessCombinationPreferredStockLiabilityAssumed" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item"/>
<element name="WeightedAverageMaturityOfUnderlyingDeposits" id="ucbi_WeightedAverageMaturityOfUnderlyingDeposits" type="xbrli:durationItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
<element name="BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentAcquiredLoans" id="ucbi_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentAcquiredLoans" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item"/>
<element name="BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentOtherRealEstateOwned" id="ucbi_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentOtherRealEstateOwned" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item"/>
<element name="BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentOtherAssets" id="ucbi_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentOtherAssets" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item"/>
<element name="CashFlowTable" id="ucbi_CashFlowTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem"/>
<element name="CashFlowLineItems" id="ucbi_CashFlowLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
<element name="UnsettledSalesOfGovernmentGuaranteedLoans" id="ucbi_UnsettledSalesOfGovernmentGuaranteedLoans" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item"/>
<element name="UnsettledPurchasesOfGovernmentGuaranteedLoans" id="ucbi_UnsettledPurchasesOfGovernmentGuaranteedLoans" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item"/>
<element name="RepurchaseAndReverseRepurchaseAgreementsGrossAmountsNotOffsetInBalanceSheetAssetsOfFinancialInstruments" id="ucbi_RepurchaseAndReverseRepurchaseAgreementsGrossAmountsNotOffsetInBalanceSheetAssetsOfFinancialInstruments" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item"/>
<element name="RepurchaseAndReverseRepurchaseAgreementsGrossAmountsNotOffsetInBalanceSheetAssetsOfCollateralReceived" id="ucbi_RepurchaseAndReverseRepurchaseAgreementsGrossAmountsNotOffsetInBalanceSheetAssetsOfCollateralReceived" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item"/>
<element name="RepurchaseAndReverseRepurchaseAgreementsNetAssets" id="ucbi_RepurchaseAndReverseRepurchaseAgreementsNetAssets" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item"/>
<element name="WeightedAverageInterestRateOfReverseRepurchaseAgreementsAssets" id="ucbi_WeightedAverageInterestRateOfReverseRepurchaseAgreementsAssets" type="num:percentItemType" abstract="false" xbrli:periodType="instant" nillable="true" substitutionGroup="xbrli:item"/>
<element name="RepurchaseAndReverseRepurchaseAgreementsGrossAmountsNotOffsetInBalanceSheetLiabilitiesOfFinancialInstruments" id="ucbi_RepurchaseAndReverseRepurchaseAgreementsGrossAmountsNotOffsetInBalanceSheetLiabilitiesOfFinancialInstruments" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item"/>
<element name="RepurchaseAndReverseRepurchaseAgreementsGrossAmountsNotOffSetInBalanceSheetLiabilitiesOfCollateralPledged" id="ucbi_RepurchaseAndReverseRepurchaseAgreementsGrossAmountsNotOffSetInBalanceSheetLiabilitiesOfCollateralPledged" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item"/>
<element name="RepurchaseAndReverseRepurchaseAgreementsNetLiabilities" id="ucbi_RepurchaseAndReverseRepurchaseAgreementsNetLiabilities" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item"/>
<element name="WeightedAverageInterestRateOfReverseRepurchaseAgreementsLiabilities" id="ucbi_WeightedAverageInterestRateOfReverseRepurchaseAgreementsLiabilities" type="num:percentItemType" abstract="false" xbrli:periodType="instant" nillable="true" substitutionGroup="xbrli:item"/>
<element name="SecuritiesOtherThanMortgageBackedSecuritiesMember" id="ucbi_SecuritiesOtherThanMortgageBackedSecuritiesMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
<element name="OwnerOccupiedCommercialRealEstateMember" id="ucbi_OwnerOccupiedCommercialRealEstateMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
<element name="IncomeProducingCommercialRealEstateMember" id="ucbi_IncomeProducingCommercialRealEstateMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
<element name="ChangesInExpectedCashFlowsThatDoNotAffectNonaccretableDifference" id="ucbi_ChangesInExpectedCashFlowsThatDoNotAffectNonaccretableDifference" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item"/>
<element name="ExecutiveOfficersAndDirectorsMember" id="ucbi_ExecutiveOfficersAndDirectorsMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
<element name="AllowanceForUnfundedLoanCommitmentMember" id="ucbi_AllowanceForUnfundedLoanCommitmentMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
<element name="AverageBalancesOfImpairedLoansAndIncomeRecognizedOnImpairedLoansAbstract" id="ucbi_AverageBalancesOfImpairedLoansAndIncomeRecognizedOnImpairedLoansAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
<element name="OtherTypeOfModificationMember" id="ucbi_OtherTypeOfModificationMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
<element name="WatchMember" id="ucbi_WatchMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
<element name="RiskCategoryOfLoansByClassOfLoansAbstract" id="ucbi_RiskCategoryOfLoansByClassOfLoansAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
<element name="LoansAndLeasesReceivableExcludingPurchasedCreditImpairedLoans" id="ucbi_LoansAndLeasesReceivableExcludingPurchasedCreditImpairedLoans" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item"/>
<element name="MinimumAmountOfLoanEvaluatedForImpairment" id="ucbi_MinimumAmountOfLoanEvaluatedForImpairment" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item"/>

<element name="SpecificReservesAllocatedToCustomersWhoseLoanTermsModifiedInTroubledDebtRestructurings" id="ucbi_SpecificReservesAllocatedToCustomersWhoseLoanTermsModifiedInTroubledDebtRestructurings" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item"/>
<element name="RecognizedImpairmentOnPropertiesAcquired" id="ucbi_RecognizedImpairmentOnPropertiesAcquired" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item"/>
<element name="GoodwillAcquiredDuringPeriodTwo" id="ucbi_GoodwillAcquiredDuringPeriodTwo" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item"/>
<element name="GoodwillAcquiredDuringPeriodThree" id="ucbi_GoodwillAcquiredDuringPeriodThree" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item"/>
<element name="GoodwillNetOfAccumulatedImpairmentLossesAcquisitionOfTidelands" id="ucbi_GoodwillNetOfAccumulatedImpairmentLossesAcquisitionOfTidelands" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item"/>
<element name="GoodwillNetOfAccumulatedImpairmentLossesMeasurementPeriodAdjustments" id="ucbi_GoodwillNetOfAccumulatedImpairmentLossesMeasurementPeriodAdjustments" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item"/>
<element name="GoodwillNetOfAccumulatedImpairmentLossesAcquisitionOfFourOaksFincorpInc" id="ucbi_GoodwillNetOfAccumulatedImpairmentLossesAcquisitionOfFourOaksFincorpInc" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item"/>
<element name="GoodwillNetOfAccumulatedImpairmentLossesAcquisitionOfHCSBFinancialCorporation" id="ucbi_GoodwillNetOfAccumulatedImpairmentLossesAcquisitionOfHCSBFinancialCorporation" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item"/>
<element name="ForeclosedPropertyTable" id="ucbi_ForeclosedPropertyTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem"/>
<element name="ForeclosedPropertyAxis" id="ucbi_ForeclosedPropertyAxis" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:dimensionItem"/>
<element name="ForeclosedPropertyDomain" id="ucbi_ForeclosedPropertyDomain" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
<element name="CommercialConstructionMember" id="ucbi_CommercialConstructionMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
<element name="CommertialPropertyMember" id="ucbi_CommertialPropertyMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>

<element name="ForeclosedPropertyLineItems" id="ucbi_ForeclosedPropertyLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
<element name="ServicingAssetAdditionsAbstract" id="ucbi_ServicingAssetAdditionsAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
<element name="ServicingAssetAtFairValueOriginatedServicingRightsCapitalizedUponSaleOfLoans" id="ucbi_ServicingAssetAtFairValueOriginatedServicingRightsCapitalizedUponSaleOfLoans" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item"/>
<element name="ServicingAssetSubtractionsAbstract" id="ucbi_ServicingAssetSubtractionsAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>





<element name="ServicingAssetsAndServicingLiabilitiesAtFairValueAssumptionsUsedToEstimateFairValueWeightedAverageGrossMargin" id="ucbi_ServicingAssetsAndServicingLiabilitiesAtFairValueAssumptionsUsedToEstimateFairValueWeightedAverageGrossMargin" type="num:percentItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
<element name="ServicingAssetAtFairValueAdditionsAbstract" id="ucbi_ServicingAssetAtFairValueAdditionsAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
<element name="ServicingAssetAtFairValueOriginationOfServicingAssetCapitalizedUponSale" id="ucbi_ServicingAssetAtFairValueOriginationOfServicingAssetCapitalizedUponSale" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item"/>
<element name="ServicingAssetAtFairValueSubtractionsAbstract" id="ucbi_ServicingAssetAtFairValueSubtractionsAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
<element name="ChangesInFairValueAbstract" id="ucbi_ChangesInFairValueAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
<element name="ServicingAssetAtAmortizedCostAdditionsAbstract" id="ucbi_ServicingAssetAtAmortizedCostAdditionsAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
<element name="ServicingAssetAtAmortizedCostOriginationOfServicingAssetCapitalizedUponSale" id="ucbi_ServicingAssetAtAmortizedCostOriginationOfServicingAssetCapitalizedUponSale" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item"/>
<element name="ServicingAssetAtAmortizedCostSubtractionsAbstract" id="ucbi_ServicingAssetAtAmortizedCostSubtractionsAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
<element name="ScheduleOfServicingAssetTable" id="ucbi_ScheduleOfServicingAssetTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem"/>
<element name="ScheduleOfServicingAssetLineItems" id="ucbi_ScheduleOfServicingAssetLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
<element name="ContractualMaturitiesOfTimeDepositsIncludingBrokeredTimeDeposits" id="ucbi_ContractualMaturitiesOfTimeDepositsIncludingBrokeredTimeDeposits" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item"/>
<element name="DailyAverageBalanceOfBrokeredDeposits" id="ucbi_DailyAverageBalanceOfBrokeredDeposits" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item"/>
<element name="FederalHomeLoanBankAdvancesInterestRateYearOne" id="ucbi_FederalHomeLoanBankAdvancesInterestRateYearOne" type="num:percentItemType" abstract="false" xbrli:periodType="instant" nillable="true" substitutionGroup="xbrli:item"/>
<element name="FederalHomeLoanBankAdvancesInterestRateYearTwo" id="ucbi_FederalHomeLoanBankAdvancesInterestRateYearTwo" type="num:percentItemType" abstract="false" xbrli:periodType="instant" nillable="true" substitutionGroup="xbrli:item"/>
<element name="TwoThousandSeventeenSeniorDebenturesMember" id="ucbi_TwoThousandSeventeenSeniorDebenturesMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
<element name="TwoThousandEighteenSeniorDebenturesMember" id="ucbi_TwoThousandEighteenSeniorDebenturesMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
<element name="TwoThousandTwentyTwoSeniorDebenturesMember" id="ucbi_TwoThousandTwentyTwoSeniorDebenturesMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
<element name="TwoThousandTwentySevenSeniorDebenturesMember" id="ucbi_TwoThousandTwentySevenSeniorDebenturesMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
<element name="SeniorDebenturesMember" id="ucbi_SeniorDebenturesMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
<element name="SubordinatedDebenturesMember" id="ucbi_SubordinatedDebenturesMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
<element name="SouthernBancorpCapitalTrustOneMember" id="ucbi_SouthernBancorpCapitalTrustOneMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
<element name="UnitedCommunityStatutoryTrustThreeMember" id="ucbi_UnitedCommunityStatutoryTrustThreeMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
<element name="TidelandsStatutoryTrustOneMember" id="ucbi_TidelandsStatutoryTrustOneMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
<element name="TidelandsStatutoryTrustTwoMember" id="ucbi_TidelandsStatutoryTrustTwoMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
<element name="FourOaksStatutoryTrustIMember" id="ucbi_FourOaksStatutoryTrustIMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
<element name="DebtInstrumentIssueYear" id="ucbi_DebtInstrumentIssueYear" type="xbrli:gYearItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
<element name="DebtInstrumentsMaturityYear" id="ucbi_DebtInstrumentsMaturityYear" type="xbrli:gYearItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
<element name="DebtInstrumentEarliestCallYear" id="ucbi_DebtInstrumentEarliestCallYear" type="xbrli:gYearItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
<element name="MarginAddedToPrimeRateToDetermineEffectiveInterestRate" id="ucbi_MarginAddedToPrimeRateToDetermineEffectiveInterestRate" type="num:percentItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
<element name="AccumulatedAmortizationOfGainsIncludedInNetIncomeOnAvailableForSaleSecuritiesTransferredToHeldToMaturityMember" id="ucbi_AccumulatedAmortizationOfGainsIncludedInNetIncomeOnAvailableForSaleSecuritiesTransferredToHeldToMaturityMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
<element name="ReclassificationOfDisproportionateTaxEffectRelatedToTerminatedCashFlowHedgesMember" id="ucbi_ReclassificationOfDisproportionateTaxEffectRelatedToTerminatedCashFlowHedgesMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
<element name="SalariesAndEmployeeBenefitsExpenseMember" id="ucbi_SalariesAndEmployeeBenefitsExpenseMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
<element name="AmortizationOfLossesOnDesignatedPositionsDepositsInBanksAndShortTermInvestmentsInterestRevenue" id="ucbi_AmortizationOfLossesOnDesignatedPositionsDepositsInBanksAndShortTermInvestmentsInterestRevenue" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item"/>
<element name="AmortizationOfLossesOnDesignatedPositionsMoneyMarketDepositInterestExpense" id="ucbi_AmortizationOfLossesOnDesignatedPositionsMoneyMarketDepositInterestExpense" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item"/>
<element name="AmortizationOfLossesOnDesignatedPositionsFederalHomeLoanBankAdvancesInterestExpense" id="ucbi_AmortizationOfLossesOnDesignatedPositionsFederalHomeLoanBankAdvancesInterestExpense" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item"/>

<element name="EmployeesMember" id="ucbi_EmployeesMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>

<element name="AddDeductAbstract" id="ucbi_AddDeductAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
<element name="IncomeTaxReconciliationChangeInReservesForUncertainTaxPositions" id="ucbi_IncomeTaxReconciliationChangeInReservesForUncertainTaxPositions" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item"/>
<element name="IncomeTaxReconciliationTaxTransactionCosts" id="ucbi_IncomeTaxReconciliationTaxTransactionCosts" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item"/>
<element name="ChangeInStateStatutoryTaxRate" id="ucbi_ChangeInStateStatutoryTaxRate" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item"/>
<element name="ReleaseOfDisproportionateTaxEffectsRelatedToDe-DesignatedCashFlowHedges" id="ucbi_ReleaseOfDisproportionateTaxEffectsRelatedToDe-DesignatedCashFlowHedges" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item"/>
<element name="DeferredTaxAssetsLoanPurchaseAccountingAdjustment" id="ucbi_DeferredTaxAssetsLoanPurchaseAccountingAdjustment" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item"/>
<element name="DeferredTaxAssetsReserveForLossesOnForeclosedProperties" id="ucbi_DeferredTaxAssetsReserveForLossesOnForeclosedProperties" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item"/>
<element name="DeferredTaxLiabilitiesLoanCosts" id="ucbi_DeferredTaxLiabilitiesLoanCosts" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item"/>
<element name="DeferredTaxLiabilitiesServicingAsset" id="ucbi_DeferredTaxLiabilitiesServicingAsset" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item"/>
<element name="DeferredTaxLiabilityUncertainTaxPositions" id="ucbi_DeferredTaxLiabilityUncertainTaxPositions" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item"/>
<element name="UnrecognizedTaxBenefitsDecreasesRemeasurementDueToEnactmentOfFederalTaxReform" id="ucbi_UnrecognizedTaxBenefitsDecreasesRemeasurementDueToEnactmentOfFederalTaxReform" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item"/>
<element name="NetOperatingLossCarryForwardsBeginToExpireInTwoZeroOneEightMember" id="ucbi_NetOperatingLossCarryForwardsBeginToExpireInTwoZeroOneEightMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
<element name="StateTaxCreditBeginToExpiresIn2022Member" id="ucbi_StateTaxCreditBeginToExpiresIn2022Member" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
<element name="NetOperatingLossCarryForwardsBeginToExpireInTwoZeroThreeZeroMember" id="ucbi_NetOperatingLossCarryForwardsBeginToExpireInTwoZeroThreeZeroMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
<element name="NetOperatingLossCarryForwardsBeginToExpireInTwoZeroThreeOneMember" id="ucbi_NetOperatingLossCarryForwardsBeginToExpireInTwoZeroThreeOneMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
<element name="NetOperatingLossCarryForwardsBeginToExpireInTwoZeroTwoSevenMember" id="ucbi_NetOperatingLossCarryForwardsBeginToExpireInTwoZeroTwoSevenMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
<element name="NetOperatingLossCarryForwardsBeginToExpireInTwoZeroTwoEightMember" id="ucbi_NetOperatingLossCarryForwardsBeginToExpireInTwoZeroTwoEightMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>






<element name="FederalAlternativeMinimumTaxCreditsSubjectToAnnualLimitation" id="ucbi_FederalAlternativeMinimumTaxCreditsSubjectToAnnualLimitation" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item"/>

<element name="ModifiedRetirementPlanMember" id="ucbi_ModifiedRetirementPlanMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
<element name="MeasurementDateOfDefinedBenefitPlan" id="ucbi_MeasurementDateOfDefinedBenefitPlan" type="xbrli:stringItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
<element name="EstimatedFutureBenefitPaymentsExpectedToBePaid" id="ucbi_EstimatedFutureBenefitPaymentsExpectedToBePaid" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item"/>
<element name="MutualFundsMember" id="ucbi_MutualFundsMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>

<element name="DeferredCompensationArrangementWithIndividualRequisiteVestingPeriod" id="ucbi_DeferredCompensationArrangementWithIndividualRequisiteVestingPeriod" type="xbrli:durationItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
<element name="DefinedContributionPlanReducedMaximumContributionOfEligibleCompensationPerEmployeePercent" id="ucbi_DefinedContributionPlanReducedMaximumContributionOfEligibleCompensationPerEmployeePercent" type="num:percentItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
<element name="DefinedContributionPlanReducedMaximumMatchingContributionPerEmployeePercent" id="ucbi_DefinedContributionPlanReducedMaximumMatchingContributionPerEmployeePercent" type="num:percentItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
<element name="DefinedContributionPlanEmployerMatchingContributionAmount" id="ucbi_DefinedContributionPlanEmployerMatchingContributionAmount" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item"/>
<element name="BrokeredCertificateOfDepositMember" id="ucbi_BrokeredCertificateOfDepositMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
<element name="CustomerSwapPositionMember" id="ucbi_CustomerSwapPositionMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
<element name="DealerOffsetToCustomerSwapPositionMember" id="ucbi_DealerOffsetToCustomerSwapPositionMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
<element name="RiskParticipationsMember" id="ucbi_RiskParticipationsMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
<element name="MortgageBankingLoanCommitmentMember" id="ucbi_MortgageBankingLoanCommitmentMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
<element name="MortgageBankingForwardSalesCommitmentMember" id="ucbi_MortgageBankingForwardSalesCommitmentMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
<element name="BifurcatedEmbeddedDerivativeMember" id="ucbi_BifurcatedEmbeddedDerivativeMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
<element name="DealerOffsetsToBifurcatedEmbeddedDerivativesMember" id="ucbi_DealerOffsetsToBifurcatedEmbeddedDerivativesMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
<element name="OffSettingPositionsForDeDesignatedCashFlowHedgesMember" id="ucbi_OffSettingPositionsForDeDesignatedCashFlowHedgesMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
<element name="DeDesignatedCashFlowHedgeMember" id="ucbi_DeDesignatedCashFlowHedgeMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
<element name="CustomerDerivativesAndDealerOffsetsMember" id="ucbi_CustomerDerivativesAndDealerOffsetsMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
<element name="BifurcatedEmbeddedDerivativesAndDealerOffsetsMember" id="ucbi_BifurcatedEmbeddedDerivativesAndDealerOffsetsMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
<element name="MortgageBankingDerivativesMember" id="ucbi_MortgageBankingDerivativesMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
<element name="OtherFeeRevenueMember" id="ucbi_OtherFeeRevenueMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
<element name="MortgageLoanRevenueMember" id="ucbi_MortgageLoanRevenueMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
<element name="CommonEquityTierOneCapitalRequiredForCapitalAdequacyToRiskWeightedAssets" id="ucbi_CommonEquityTierOneCapitalRequiredForCapitalAdequacyToRiskWeightedAssets" type="num:percentItemType" abstract="false" xbrli:periodType="instant" nillable="true" substitutionGroup="xbrli:item"/>
<element name="CommonEquityTier1CapitalRequiredToBeWellCapitalizedToRiskWeightedAssets" id="ucbi_CommonEquityTier1CapitalRequiredToBeWellCapitalizedToRiskWeightedAssets" type="num:percentItemType" abstract="false" xbrli:periodType="instant" nillable="true" substitutionGroup="xbrli:item"/>
<element name="LeverageRatioAdequatelyCapitalized" id="ucbi_LeverageRatioAdequatelyCapitalized" type="num:percentItemType" abstract="false" xbrli:periodType="instant" nillable="true" substitutionGroup="xbrli:item"/>
<element name="MaximumPercentageOfCreditToAffiliateUnderFederalReserveAct" id="ucbi_MaximumPercentageOfCreditToAffiliateUnderFederalReserveAct" type="num:percentItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
<element name="MaximumPercentageOfCreditToAllAffiliatesUnderFederalReserveAct" id="ucbi_MaximumPercentageOfCreditToAllAffiliatesUnderFederalReserveAct" type="num:percentItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
<element name="MinimumLeasePaymentsMember" id="ucbi_MinimumLeasePaymentsMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
<element name="InvestmentInLimitedPartnerships" id="ucbi_InvestmentInLimitedPartnerships" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item"/>
<element name="CommitmentForAdditionalFund" id="ucbi_CommitmentForAdditionalFund" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item"/>
<element name="StockholdersEquityNoteDisclosureTable" id="ucbi_StockholdersEquityNoteDisclosureTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem"/>
<element name="StockholdersEquityNoteDisclosureLineItems" id="ucbi_StockholdersEquityNoteDisclosureLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>

<element name="PercentageIncreaseDividendRate" id="ucbi_PercentageIncreaseDividendRate" type="num:percentItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
<element name="Share-BasedCompensationArrangementByShare-BasedPaymentAwardEquityInstrumentsOtherThanOptionsExpiredInPeriod" id="ucbi_Share-BasedCompensationArrangementByShare-BasedPaymentAwardEquityInstrumentsOtherThanOptionsExpiredInPeriod" type="xbrli:sharesItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
<element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsExercisableNumber" id="ucbi_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsExercisableNumber" type="xbrli:sharesItemType" abstract="false" xbrli:periodType="instant" nillable="true" substitutionGroup="xbrli:item"/>
<element name="Share-BasedCompensationArrangementByShare-BasedPaymentAwardEquityInstrumentsOtherThanOptionsExpiredWeightedAverageGrantDateFairValue" id="ucbi_Share-BasedCompensationArrangementByShare-BasedPaymentAwardEquityInstrumentsOtherThanOptionsExpiredWeightedAverageGrantDateFairValue" type="num:perShareItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
<element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsExercisableWeightedAverageGrantDateFairValue" id="ucbi_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsExercisableWeightedAverageGrantDateFairValue" type="num:perShareItemType" abstract="false" xbrli:periodType="instant" nillable="true" substitutionGroup="xbrli:item"/>
<element name="Share-BasedCompensationArrangementsByShare-BasedPaymentAwardOptionsVestedInPeriodWeightedAverageExercisePrice" id="ucbi_Share-BasedCompensationArrangementsByShare-BasedPaymentAwardOptionsVestedInPeriodWeightedAverageExercisePrice" type="num:perShareItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
<element name="ExercisePriceRangeTenToFifteenMember" id="ucbi_ExercisePriceRangeTenToFifteenMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
<element name="ExercisePriceRangeFifteenPointZeroOneToTwentyMember" id="ucbi_ExercisePriceRangeFifteenPointZeroOneToTwentyMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
<element name="ExercisePriceRangeTwentyPointZeroOneToTwentyFiveMember" id="ucbi_ExercisePriceRangeTwentyPointZeroOneToTwentyFiveMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
<element name="ExercisePriceRangeTwentyFivePointZeroOneToThirtyMember" id="ucbi_ExercisePriceRangeTwentyFivePointZeroOneToThirtyMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
<element name="ExercisePriceRangeThirtyPointZeroOneToThirtyOnePointFiftyMember" id="ucbi_ExercisePriceRangeThirtyPointZeroOneToThirtyOnePointFiftyMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
<element name="ExercisePriceRangeTenToThirtyOnePointFiftyMember" id="ucbi_ExercisePriceRangeTenToThirtyOnePointFiftyMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
<element name="MergerRelatedAndOtherChargesMember" id="ucbi_MergerRelatedAndOtherChargesMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
<element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardExercisablePeriod" id="ucbi_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardExercisablePeriod" type="xbrli:durationItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
<element name="ModificationOfExistingAwardsDueToRetirement" id="ucbi_ModificationOfExistingAwardsDueToRetirement" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item"/>
<element name="DeferredIncomeTaxBenefitRelatedToCompensationExpenseForOptionsAndRestrictedStock" id="ucbi_DeferredIncomeTaxBenefitRelatedToCompensationExpenseForOptionsAndRestrictedStock" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item"/>

<element name="StockIssuedDuringPeriodSharesEmployeeStockPensionPlan" id="ucbi_StockIssuedDuringPeriodSharesEmployeeStockPensionPlan" type="xbrli:sharesItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
<element name="CommonStockIssuableSharesUnderDeferredCompensationPlan" id="ucbi_CommonStockIssuableSharesUnderDeferredCompensationPlan" type="xbrli:sharesItemType" abstract="false" xbrli:periodType="instant" nillable="true" substitutionGroup="xbrli:item"/>
<element name="MortgageLoansHeldForSaleMember" id="ucbi_MortgageLoansHeldForSaleMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
<element name="DeferredCompensationPlanAssetsMember" id="ucbi_DeferredCompensationPlanAssetsMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
<element name="DeferredCompensationPlanLiabilityMember" id="ucbi_DeferredCompensationPlanLiabilityMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
<element name="TypeOfSecurityAxis" id="ucbi_TypeOfSecurityAxis" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:dimensionItem"/>
<element name="TypeOfSecurityDomain" id="ucbi_TypeOfSecurityDomain" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
<element name="DerivativeAssetMember" id="ucbi_DerivativeAssetMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
<element name="DerivativeLiabilityMember" id="ucbi_DerivativeLiabilityMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
<element name="ServicingRightsMember" id="ucbi_ServicingRightsMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
<element name="FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSalesAndSettlements" id="ucbi_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSalesAndSettlements" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item"/>
<element name="DerivativeAssetsOtherMember" id="ucbi_DerivativeAssetsOtherMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
<element name="DerivativeLiabilitiesRiskParticipationsMember" id="ucbi_DerivativeLiabilitiesRiskParticipationsMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
<element name="DerivativeLiabilityOtherMember" id="ucbi_DerivativeLiabilityOtherMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
<element name="FairValueInputPullThroughRate" id="ucbi_FairValueInputPullThroughRate" type="num:percentItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
<element name="FairValueInputsProbableExposureRate" id="ucbi_FairValueInputsProbableExposureRate" type="num:percentItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
<element name="MortgageLoansHeldForSaleOutstandingPrincipalBalance" id="ucbi_MortgageLoansHeldForSaleOutstandingPrincipalBalance" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item"/>
<element name="PercentageOfWrittenDownInAppraisalValueOfNonaccrualImpairedLoans" id="ucbi_PercentageOfWrittenDownInAppraisalValueOfNonaccrualImpairedLoans" type="num:percentItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
<element name="MaximumRemainingMaturityOfFinancialInstrumentsHavingNoDefinedMaturity" id="ucbi_MaximumRemainingMaturityOfFinancialInstrumentsHavingNoDefinedMaturity" type="xbrli:durationItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
<element name="DividendsFromBank" id="ucbi_DividendsFromBank" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item"/>
<element name="InvestmentsInBank" id="ucbi_InvestmentsInBank" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item"/>
<element name="CashDividendsOnSeriesHPreferredStock" id="ucbi_CashDividendsOnSeriesHPreferredStock" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item"/>
<element name="NlfcHoldingsCorpMember" id="ucbi_NlfcHoldingsCorpMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
<element name="NavitasCreditCorpMember" id="ucbi_NavitasCreditCorpMember" type="nonnum:domainItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
<element name="DebtInstrumentCallPeriod" id="ucbi_DebtInstrumentCallPeriod" type="xbrli:durationItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item"/>
<element name="BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLoans" id="ucbi_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLoans" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="instant" xbrli:balance="debit" nillable="true" substitutionGroup="xbrli:item"/>
<element name="PaymentsToPurchaseLoans" id="ucbi_PaymentsToPurchaseLoans" type="xbrli:monetaryItemType" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" nillable="true" substitutionGroup="xbrli:item"/>
<element name="FundsPaidToFdicUnderLossSharingAgreements" id="ucbi_FundsPaidToFdicUnderLossSharingAgreements" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" abstract="false" nillable="true" xbrli:balance="credit"/>
<element name="AdvancesFromFederalHomeLoanBanksPrincipleOutstanding" id="ucbi_AdvancesFromFederalHomeLoanBanksPrincipleOutstanding" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" abstract="false" nillable="true" xbrli:balance="credit"/>
<element name="OtherComprehensiveIncomeLossAmortizationOfLossesIncludedInNetIncomeOnTerminatedDerivativeFinancialInstrumentsWhichPreviouslyAccountedForAsCashFlowHedgesBeforeTax" id="ucbi_OtherComprehensiveIncomeLossAmortizationOfLossesIncludedInNetIncomeOnTerminatedDerivativeFinancialInstrumentsWhichPreviouslyAccountedForAsCashFlowHedgesBeforeTax" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" abstract="false" nillable="true" xbrli:balance="credit"/>







<element name="OtherComprehensiveIncomeLossAmortizationOfLossesIncludedInNetIncomeOnTerminatedDerivativeFinancialInstrumentsWhichPreviouslyAccountedForAsCashFlowHedgesTax" id="ucbi_OtherComprehensiveIncomeLossAmortizationOfLossesIncludedInNetIncomeOnTerminatedDerivativeFinancialInstrumentsWhichPreviouslyAccountedForAsCashFlowHedgesTax" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" abstract="false" nillable="true" xbrli:balance="debit"/>
<element name="OtherComprehensiveIncomeLossAmortizationOfLossesIncludedInNetIncomeOnTerminatedDerivativeFinancialInstrumentsWhichPreviouslyAccountedForAsCashFlowHedgesNetOfTax" id="ucbi_OtherComprehensiveIncomeLossAmortizationOfLossesIncludedInNetIncomeOnTerminatedDerivativeFinancialInstrumentsWhichPreviouslyAccountedForAsCashFlowHedgesNetOfTax" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" abstract="false" nillable="true" xbrli:balance="credit"/>
</schema>
