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  <xs:element id="ucbi_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsExercisableWeightedAverageGrantDateFairValue" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsExercisableWeightedAverageGrantDateFairValue" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types1:perShareItemType"/>
  <xs:element id="ucbi_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedShortTermBorrowings" abstract="false" name="BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedShortTermBorrowings" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ucbi_OtherOperatingExpenseMember" abstract="true" name="OtherOperatingExpenseMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ucbi_DerivativeAssetMember" abstract="true" name="DerivativeAssetMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ucbi_ComprehensiveIncomeLossTax" abstract="false" name="ComprehensiveIncomeLossTax" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ucbi_OCIDebtSecuritiesAvailableForSaleTransferToHeldToMaturityAdjustmentFromAOCIForAmortizationOfUnrealizedGainLossAfterTax" abstract="false" name="OCIDebtSecuritiesAvailableForSaleTransferToHeldToMaturityAdjustmentFromAOCIForAmortizationOfUnrealizedGainLossAfterTax" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ucbi_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedBankOwnedLifeInsurance" abstract="false" name="BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedBankOwnedLifeInsurance" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ucbi_OtherComprehensiveIncomeLossAmortizationOfPriorServiceCostAndActuarialLossesIncludeNetPeriodicPensionCostForDefinedBenefitPensionPlanNetOfTax" abstract="false" name="OtherComprehensiveIncomeLossAmortizationOfPriorServiceCostAndActuarialLossesIncludeNetPeriodicPensionCostForDefinedBenefitPensionPlanNetOfTax" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ucbi_MortgagesHeldForSaleAfterNonrecurringFairValueAdjustmentCarryingValue" abstract="false" name="MortgagesHeldForSaleAfterNonrecurringFairValueAdjustmentCarryingValue" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ucbi_FinancingReceivableExcludingAccruedInterestNonaccrualWithAllowance" abstract="false" name="FinancingReceivableExcludingAccruedInterestNonaccrualWithAllowance" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ucbi_OtherComprehensiveIncomeLossReclassificationAdjustmentAvailableForSaleToHeldToMaturityTax" abstract="false" name="OtherComprehensiveIncomeLossReclassificationAdjustmentAvailableForSaleToHeldToMaturityTax" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ucbi_OtherComprehensiveIncomeAmortizationOfUnrealizedGainLossAvailableForSaleToHeldToMaturityAfterTax" abstract="false" name="OtherComprehensiveIncomeAmortizationOfUnrealizedGainLossAvailableForSaleToHeldToMaturityAfterTax" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ucbi_ScheduleOfComponentsOfNetInvestmentInLeaseSalesTypeAndDirectFinancingLeasesTableTextBlock" abstract="false" name="ScheduleOfComponentsOfNetInvestmentInLeaseSalesTypeAndDirectFinancingLeasesTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
  <xs:element id="ucbi_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityBusinessCombinationAndProvisionalAdjustment" abstract="false" name="FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityBusinessCombinationAndProvisionalAdjustment" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ucbi_FirstMiamiBancorpIncMember" abstract="true" name="FirstMiamiBancorpIncMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ucbi_StockIssuedDuringPeriodValueDividendReinvestmentPlanEmployeeBenefitPlansAndDeferredCompensation" abstract="false" name="StockIssuedDuringPeriodValueDividendReinvestmentPlanEmployeeBenefitPlansAndDeferredCompensation" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ucbi_ProceedsFromOtherFinancingActivities" abstract="false" name="ProceedsFromOtherFinancingActivities" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ucbi_UnrealizedGainLossOnHeldToMaturitySecuritiesTableTextBlock" abstract="false" name="UnrealizedGainLossOnHeldToMaturitySecuritiesTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
  <xs:element id="ucbi_TrustPreferredSecuritiesHedgeMember" abstract="true" name="TrustPreferredSecuritiesHedgeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ucbi_SalesTypeAndDirectFinancingLeasesLeaseReceivableToBeReceivedAfterYearFour" abstract="false" name="SalesTypeAndDirectFinancingLeasesLeaseReceivableToBeReceivedAfterYearFour" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ucbi_FinancingReceivableAllowanceForCreditLossExcludingAccruedInterestAndOffBalanceSheetCreditLossLiability" abstract="false" name="FinancingReceivableAllowanceForCreditLossExcludingAccruedInterestAndOffBalanceSheetCreditLossLiability" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ucbi_OtherComprehensiveIncomeLossUnrealizedGainLossTransfersToHeldToMaturityAfterAdjustmentAfterTax" abstract="false" name="OtherComprehensiveIncomeLossUnrealizedGainLossTransfersToHeldToMaturityAfterAdjustmentAfterTax" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ucbi_OtherComprehensiveIncomeLossUnrealizedGainLossReclassificationAdjustmentAvailableForSaleToHeldToMaturityTax" abstract="false" name="OtherComprehensiveIncomeLossUnrealizedGainLossReclassificationAdjustmentAvailableForSaleToHeldToMaturityTax" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ucbi_ReliantBancorpIncMember" abstract="true" name="ReliantBancorpIncMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ucbi_OtherLendingAndLoanServicingFees" abstract="false" name="OtherLendingAndLoanServicingFees" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ucbi_OtherComprehensiveIncomeLossReclassificationAdjustmentAvailableForSaleToHeldToMaturityAfterTax" abstract="false" name="OtherComprehensiveIncomeLossReclassificationAdjustmentAvailableForSaleToHeldToMaturityAfterTax" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ucbi_ProgressBankTrustMember" abstract="true" name="ProgressBankTrustMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ucbi_RegulatoryCapitalRequirementsUnderBankingRegulationsAbstract" abstract="true" name="RegulatoryCapitalRequirementsUnderBankingRegulationsAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="ucbi_MortgageBankingLoanCommitmentMember" abstract="true" name="MortgageBankingLoanCommitmentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ucbi_FintechFundsMember" abstract="true" name="FintechFundsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ucbi_FederalFundsSoldAndOtherShortTermInvestments" abstract="false" name="FederalFundsSoldAndOtherShortTermInvestments" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ucbi_DebtSecuritiesAvailableForSaleMember" abstract="true" name="DebtSecuritiesAvailableForSaleMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ucbi_FinancingReceivableAllowanceForCreditLossAndOffBalanceSheetCreditLossLiabilityPurchasedWithCreditDeteriorationIncrease" abstract="false" name="FinancingReceivableAllowanceForCreditLossAndOffBalanceSheetCreditLossLiabilityPurchasedWithCreditDeteriorationIncrease" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ucbi_NoninterestExpenseOutsideServicesElectronicBanking" abstract="false" name="NoninterestExpenseOutsideServicesElectronicBanking" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ucbi_MortgageLoansHeldForSaleOutstandingPrincipalBalance" abstract="false" name="MortgageLoansHeldForSaleOutstandingPrincipalBalance" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ucbi_DebtSecuritiesHeldToMaturityAbstract" abstract="true" name="DebtSecuritiesHeldToMaturityAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="ucbi_OtherComprehensiveIncomeLossUnrealizedGainLossTransfersToHeldToMaturityAbstract" abstract="true" name="OtherComprehensiveIncomeLossUnrealizedGainLossTransfersToHeldToMaturityAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="ucbi_ProceedsFromOtherInvestingActivities" abstract="false" name="ProceedsFromOtherInvestingActivities" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ucbi_RiskParticipationsMember" abstract="true" name="RiskParticipationsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ucbi_OtherComprehensiveIncomeLossAmortizationOfPriorServiceCostAndActuarialLossesIncludedInNetPeriodicPensionCostForDefinedBenefitPensionPlanTaxExpenseBenefit1" abstract="false" name="OtherComprehensiveIncomeLossAmortizationOfPriorServiceCostAndActuarialLossesIncludedInNetPeriodicPensionCostForDefinedBenefitPensionPlanTaxExpenseBenefit1" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ucbi_GainLossOnDerivativeInterestSettlement" abstract="false" name="GainLossOnDerivativeInterestSettlement" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ucbi_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetBusinessCombinationAndProvisionalAdjustment" abstract="false" name="FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetBusinessCombinationAndProvisionalAdjustment" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ucbi_ComprehensiveIncomeLossBeforeTax" abstract="false" name="ComprehensiveIncomeLossBeforeTax" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ucbi_ScheduleOfFairValueHedgingInstrumentsCarryingValueAndBasisAdjustmentsTableTextBlock" abstract="false" name="ScheduleOfFairValueHedgingInstrumentsCarryingValueAndBasisAdjustmentsTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="ucbi_FederalFundsSoldCommercialPaperAndDepositsInBanks" abstract="false" name="FederalFundsSoldCommercialPaperAndDepositsInBanks" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ucbi_CommercialMortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember" abstract="true" name="CommercialMortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ucbi_SBAUSDAGuaranteedLoansMember" abstract="true" name="SBAUSDAGuaranteedLoansMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ucbi_ResidentialMortgageServicingAssetAtFairValueAmount" abstract="false" name="ResidentialMortgageServicingAssetAtFairValueAmount" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ucbi_InvestmentsInLIHTCMember" abstract="true" name="InvestmentsInLIHTCMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ucbi_FinancingReceivableAllowanceForCreditLossAndOffBalanceSheetCreditLossLiabilityWriteoff" abstract="false" name="FinancingReceivableAllowanceForCreditLossAndOffBalanceSheetCreditLossLiabilityWriteoff" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ucbi_MortgageLoansHeldForSaleAbstract" abstract="true" name="MortgageLoansHeldForSaleAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="ucbi_BifurcatedEmbeddedDerivativeMember" abstract="true" name="BifurcatedEmbeddedDerivativeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ucbi_OwnerOccupiedCommercialRealEstateMember" abstract="true" name="OwnerOccupiedCommercialRealEstateMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ucbi_AdditionalInformationRelatedToAcquiredLoanTableTextBlock" abstract="false" name="AdditionalInformationRelatedToAcquiredLoanTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
  <xs:element id="ucbi_SalesTypeAndDirectFinancingLeasesDeferredSellingProfit" abstract="false" name="SalesTypeAndDirectFinancingLeasesDeferredSellingProfit" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ucbi_OCIDebtSecuritiesAvailableForSaleTransferToHeldToMaturityAdjustmentFromAOCIForAmortizationOfUnrealizedGainLossBeforeTax" abstract="false" name="OCIDebtSecuritiesAvailableForSaleTransferToHeldToMaturityAdjustmentFromAOCIForAmortizationOfUnrealizedGainLossBeforeTax" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ucbi_DealerOffsetToCustomerSwapPositionMember" abstract="true" name="DealerOffsetToCustomerSwapPositionMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ucbi_ScheduleOfDebtSecuritiesAccruedInterestReceivableTableTextBlock" abstract="false" name="ScheduleOfDebtSecuritiesAccruedInterestReceivableTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
  <xs:element id="ucbi_DebtSecuritiesHeldToMaturityExcludingAccruedInterestTransferredFromAvailableForSaleFairValue" abstract="false" name="DebtSecuritiesHeldToMaturityExcludingAccruedInterestTransferredFromAvailableForSaleFairValue" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ucbi_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLoansHeldForSale" abstract="false" name="BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLoansHeldForSale" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ucbi_BusinessCombinationConsiderationTransferredConvertedStockOptions" abstract="false" name="BusinessCombinationConsiderationTransferredConvertedStockOptions" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ucbi_PaymentsForBranchDisposalInvestingActivities" abstract="false" name="PaymentsForBranchDisposalInvestingActivities" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ucbi_StockOptionsAbstract" abstract="true" name="StockOptionsAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="ucbi_MortgageBankingDerivativesMember" abstract="true" name="MortgageBankingDerivativesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ucbi_CommonStockIssuableShares" abstract="false" name="CommonStockIssuableShares" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="ucbi_OtherComprehensiveIncomeAmortizationOfUnrealizedGainLossAvailableForSaleToHeldToMaturityTax" abstract="false" name="OtherComprehensiveIncomeAmortizationOfUnrealizedGainLossAvailableForSaleToHeldToMaturityTax" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ucbi_ResidentialMortgageBackedSecuritiesIssuedByPrivateEnterprisesMember" abstract="true" name="ResidentialMortgageBackedSecuritiesIssuedByPrivateEnterprisesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ucbi_ResidentialMortgageAndManufacturedHousingMember" abstract="true" name="ResidentialMortgageAndManufacturedHousingMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ucbi_OCIDebtSecuritiesAvailableForSaleTransferToHeldToMaturityAdjustmentFromAOCIForAmortizationOfUnrealizedGainLossTax" abstract="false" name="OCIDebtSecuritiesAvailableForSaleTransferToHeldToMaturityAdjustmentFromAOCIForAmortizationOfUnrealizedGainLossTax" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ucbi_CustomerSwapPositionMember" abstract="true" name="CustomerSwapPositionMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ucbi_StockIssuedDuringPeriodSharesDividendReinvestmentPlanEmployeeBenefitPlansAndDeferredCompensation" abstract="false" name="StockIssuedDuringPeriodSharesDividendReinvestmentPlanEmployeeBenefitPlansAndDeferredCompensation" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="ucbi_FinancingReceivableModifiedNumberOfExtensions" abstract="false" name="FinancingReceivableModifiedNumberOfExtensions" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="ucbi_RestrictedStockUnitsRSUAndPerformanceStockUnitsMember" abstract="true" name="RestrictedStockUnitsRSUAndPerformanceStockUnitsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ucbi_BifurcatedEmbeddedDerivativesAndDealerOffsetsMember" abstract="true" name="BifurcatedEmbeddedDerivativesAndDealerOffsetsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ucbi_DebtSecuritiesAvailableForSaleAndEquitySecuritiesAbstract" abstract="true" name="DebtSecuritiesAvailableForSaleAndEquitySecuritiesAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="ucbi_DebtSecuritiesAvailableForSaleAndHeldToMaturityLineItems" abstract="true" name="DebtSecuritiesAvailableForSaleAndHeldToMaturityLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="ucbi_OtherComprehensiveIncomeLossUnrealizedGainLossReclassificationAdjustmentAvailableForSaleToHeldToMaturityBeforeTax" abstract="false" name="OtherComprehensiveIncomeLossUnrealizedGainLossReclassificationAdjustmentAvailableForSaleToHeldToMaturityBeforeTax" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ucbi_DepositaryShareOnUCBISeriesINonCumulativePreferredStockMember" abstract="true" name="DepositaryShareOnUCBISeriesINonCumulativePreferredStockMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ucbi_MaximumRemainingMaturityOfFinancialInstrumentsHavingNoDefinedMaturity" abstract="false" name="MaximumRemainingMaturityOfFinancialInstrumentsHavingNoDefinedMaturity" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="ucbi_CommitmentsToFundEquityInvestments" abstract="false" name="CommitmentsToFundEquityInvestments" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ucbi_MortgageBankingForwardSalesCommitmentMember" abstract="true" name="MortgageBankingForwardSalesCommitmentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ucbi_NumberOfBranches" abstract="false" name="NumberOfBranches" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="ucbi_FinancingReceivableModifiedWeightedAveragePaymentDelayTermIncreaseFromModification" abstract="false" name="FinancingReceivableModifiedWeightedAveragePaymentDelayTermIncreaseFromModification" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="ucbi_EmployeeMember" abstract="true" name="EmployeeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ucbi_DepositaryShares11000thOfPreferredShareMember" abstract="true" name="DepositaryShares11000thOfPreferredShareMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="ucbi_SalariesAndEmployeeBenefitExpenseMember" abstract="true" name="SalariesAndEmployeeBenefitExpenseMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ucbi_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsExercisableNumber" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsExercisableNumber" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="ucbi_OtherComprehensiveIncomeLossUnrealizedGainLossTransfersToHeldToMaturityAfterAdjustmentTax" abstract="false" name="OtherComprehensiveIncomeLossUnrealizedGainLossTransfersToHeldToMaturityAfterAdjustmentTax" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ucbi_FinancingReceivableAllowanceForCreditLossAndOffBalanceSheetCreditLossLiabilityRecovery" abstract="false" name="FinancingReceivableAllowanceForCreditLossAndOffBalanceSheetCreditLossLiabilityRecovery" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ucbi_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilitySalesAndSettlements" abstract="false" name="FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilitySalesAndSettlements" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ucbi_SBAServicingRightsMember" abstract="true" name="SBAServicingRightsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ucbi_ScheduleOfFinancingReceivablesSoldLoansTableTextBlock" abstract="false" name="ScheduleOfFinancingReceivablesSoldLoansTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
  <xs:element id="ucbi_DebtSecuritiesHeldToMaturityMember" abstract="true" name="DebtSecuritiesHeldToMaturityMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ucbi_NoncashOrPartNoncashAcquisitionsAbstract" abstract="true" name="NoncashOrPartNoncashAcquisitionsAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="ucbi_CommercialMortgageBackedSecuritiesIssuedByPrivateEnterprisesMember" abstract="true" name="CommercialMortgageBackedSecuritiesIssuedByPrivateEnterprisesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ucbi_StockRepurchaseShareConversionRatio" abstract="false" name="StockRepurchaseShareConversionRatio" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:pureItemType"/>
  <xs:element id="ucbi_OtherComprehensiveIncomeLossAmortizationOfPriorServiceCostAndActuarialLossesIncludedInNetPeriodicPensionCostForDefinedBenefitPensionPlanBeforeTaxAmount" abstract="false" name="OtherComprehensiveIncomeLossAmortizationOfPriorServiceCostAndActuarialLossesIncludedInNetPeriodicPensionCostForDefinedBenefitPensionPlanBeforeTaxAmount" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ucbi_RenewableEnergyInvestmentsMember" abstract="true" name="RenewableEnergyInvestmentsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ucbi_IncomeProducingCommercialRealEstateMember" abstract="true" name="IncomeProducingCommercialRealEstateMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ucbi_CustomerDerivativesAndDealerOffsetsMember" abstract="true" name="CustomerDerivativesAndDealerOffsetsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ucbi_ResidentialMortgageServicingAssetMeasurementInput" abstract="false" name="ResidentialMortgageServicingAssetMeasurementInput" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:decimalItemType"/>
  <xs:element id="ucbi_OtherComprehensiveIncomeLossReclassificationAdjustmentAvailableForSaleToHeldToMaturityBeforeTax" abstract="false" name="OtherComprehensiveIncomeLossReclassificationAdjustmentAvailableForSaleToHeldToMaturityBeforeTax" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ucbi_CommercialAndIndustrialClassificationMember" abstract="true" name="CommercialAndIndustrialClassificationMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ucbi_RestrictedStockUnitsAbstract" abstract="true" name="RestrictedStockUnitsAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="ucbi_OtherComprehensiveIncomeLossUnrealizedGainLossTransfersToHeldToMaturityAfterAdjustmentBeforeTax" abstract="false" name="OtherComprehensiveIncomeLossUnrealizedGainLossTransfersToHeldToMaturityAfterAdjustmentBeforeTax" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ucbi_DebtSecuritiesAvailableForSaleAndHeldToMaturityTable" abstract="true" name="DebtSecuritiesAvailableForSaleAndHeldToMaturityTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="ucbi_DerivativeAssetsMortgageMember" abstract="true" name="DerivativeAssetsMortgageMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ucbi_ProceedsFromOtherInvestments" abstract="false" name="ProceedsFromOtherInvestments" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ucbi_SalesTypeAndDirectFinancingLeasesInitialDirectCosts" abstract="false" name="SalesTypeAndDirectFinancingLeasesInitialDirectCosts" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ucbi_OtherComprehensiveIncomeAmortizationOfUnrealizedGainLossAvailableForSaleToHeldToMaturityBeforeTax" abstract="false" name="OtherComprehensiveIncomeAmortizationOfUnrealizedGainLossAvailableForSaleToHeldToMaturityBeforeTax" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ucbi_FinancingReceivableModifiedExtensionFromModification" abstract="false" name="FinancingReceivableModifiedExtensionFromModification" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="ucbi_SalesTypeAndDirectFinancingLeasesUnguaranteedResidualAsset" abstract="false" name="SalesTypeAndDirectFinancingLeasesUnguaranteedResidualAsset" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ucbi_MeasurementInputPullThroughRateMember" abstract="true" name="MeasurementInputPullThroughRateMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ucbi_CommonStocksIssuable" abstract="false" name="CommonStocksIssuable" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ucbi_CommonStockIssuableMember" abstract="true" name="CommonStockIssuableMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ucbi_ResidentialMortgageServicingRightsMember" abstract="true" name="ResidentialMortgageServicingRightsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ucbi_FinancingReceivableExcludingAccruedInterestLoansInBankruptcyStatus" abstract="false" name="FinancingReceivableExcludingAccruedInterestLoansInBankruptcyStatus" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ucbi_LoansHeldForInvestmentAfterNonrecurringFairValueAdjustmentCarryingValue" abstract="false" name="LoansHeldForInvestmentAfterNonrecurringFairValueAdjustmentCarryingValue" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ucbi_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedFederalHomeLoanBankAdvances" abstract="false" name="BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedFederalHomeLoanBankAdvances" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ucbi_AccumulatedAmortizationOfLossesIncludedInNetIncomeOnAvailableForSaleSecuritiesTransferredToHeldToMaturityMember" abstract="true" name="AccumulatedAmortizationOfLossesIncludedInNetIncomeOnAvailableForSaleSecuritiesTransferredToHeldToMaturityMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ucbi_ScheduleOfTaxCreditAndCertainEquityMethodInvestmentsTableTextBlock" abstract="false" name="ScheduleOfTaxCreditAndCertainEquityMethodInvestmentsTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
  <xs:element id="ucbi_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSalesAndSettlements" abstract="false" name="FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSalesAndSettlements" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="ucbi_PaymentDelayAndExtensionMember" abstract="true" name="PaymentDelayAndExtensionMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="ucbi_DealerOffsetsToBifurcatedEmbeddedDerivativesMember" abstract="true" name="DealerOffsetsToBifurcatedEmbeddedDerivativesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
</xs:schema>
