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  <xs:element id="tcbk_OffBalanceSheetCreditLossRecovery" abstract="false" name="OffBalanceSheetCreditLossRecovery" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="tcbk_SummaryOfActivityInAllowanceForLoanLossesAndLoansNetOfUnearnedFeesTableTextBlock" abstract="false" name="SummaryOfActivityInAllowanceForLoanLossesAndLoansNetOfUnearnedFeesTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType"/>
  <xs:element id="tcbk_CRENonOwnerOccupiedMember" abstract="true" name="CRENonOwnerOccupiedMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="tcbk_SFRMortgageMember" abstract="true" name="SFRMortgageMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="tcbk_AAAAAAMember" abstract="true" name="AAAAAAMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="tcbk_FinancingReceivableNumberOfLoans" abstract="false" name="FinancingReceivableNumberOfLoans" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="tcbk_MarketValueOfSharesTenderedByEmployeesInLieuOfCashToPayForExerciseOfOptionsAndOrRelatedTaxes" abstract="false" name="MarketValueOfSharesTenderedByEmployeesInLieuOfCashToPayForExerciseOfOptionsAndOrRelatedTaxes" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="tcbk_OtherComprehensiveIncomeLossJointBeneficiaryAgreementLiabilityAdjustmentsBeforeReclassificationAndTax" abstract="false" name="OtherComprehensiveIncomeLossJointBeneficiaryAgreementLiabilityAdjustmentsBeforeReclassificationAndTax" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="tcbk_GainOnTransferOfLoansToForeclosedAssets" abstract="false" name="GainOnTransferOfLoansToForeclosedAssets" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="tcbk_OffBalanceSheetAbstract" abstract="true" name="OffBalanceSheetAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="tcbk_ServiceConditionRestrictedStockUnitsMember" abstract="true" name="ServiceConditionRestrictedStockUnitsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="tcbk_ComponentsOfOtherNoninterestIncomeTableTextBlock" abstract="false" name="ComponentsOfOtherNoninterestIncomeTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType"/>
  <xs:element id="tcbk_OperatingInterestIncomeOther" abstract="false" name="OperatingInterestIncomeOther" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="tcbk_CourierService" abstract="false" name="CourierService" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="tcbk_SFR141stDTLiensMember" abstract="true" name="SFR141stDTLiensMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="tcbk_OperationalLosses" abstract="false" name="OperationalLosses" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="tcbk_CorporateBondsMember" abstract="true" name="CorporateBondsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="tcbk_CommonEquityTierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets" abstract="false" name="CommonEquityTierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="num:percentItemType"/>
  <xs:element id="tcbk_OtherMember" abstract="true" name="OtherMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="tcbk_SaleOfCustomerChecks" abstract="false" name="SaleOfCustomerChecks" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="tcbk_NonaccrualStatusLoansContractualPastDue" abstract="false" name="NonaccrualStatusLoansContractualPastDue" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="tcbk_CREOwnerOccupiedMember" abstract="true" name="CREOwnerOccupiedMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="tcbk_ScheduleOfNonAccrualLoansTableTextBlock" abstract="false" name="ScheduleOfNonAccrualLoansTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType"/>
  <xs:element id="tcbk_DepositAccountOverdraftPrivilegeMember" abstract="true" name="DepositAccountOverdraftPrivilegeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="tcbk_ScheduleOfSupplementalCashFlowInformationRelatedToOperatingLeasesTableTextBlock" abstract="false" name="ScheduleOfSupplementalCashFlowInformationRelatedToOperatingLeasesTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType"/>
  <xs:element id="tcbk_CommercialAndIndustrialPortfolioSegmentMember" abstract="true" name="CommercialAndIndustrialPortfolioSegmentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="tcbk_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestTax" abstract="false" name="StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestTax" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="tcbk_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsOutstandingOptionPricePerShare" abstract="false" name="ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsOutstandingOptionPricePerShare" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="num:perShareItemType"/>
  <xs:element id="tcbk_CreditRatingAxis" abstract="true" name="CreditRatingAxis" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType"/>
  <xs:element id="tcbk_ComponentsOfNonInterestExpenseTableTextBlock" abstract="false" name="ComponentsOfNonInterestExpenseTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType"/>
  <xs:element id="tcbk_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsOutstandingOptionPricePerShareOfOptionsExercised" abstract="false" name="ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsOutstandingOptionPricePerShareOfOptionsExercised" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="num:perShareItemType"/>
  <xs:element id="tcbk_TimeDeposits250000OrMore" abstract="false" name="TimeDeposits250000OrMore" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="tcbk_StockRepurchasePlanMember" abstract="true" name="StockRepurchasePlanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="tcbk_CollateralPledgedAndUnsecuredMember" abstract="true" name="CollateralPledgedAndUnsecuredMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="tcbk_LoanChargedOffCarryingValue" abstract="false" name="LoanChargedOffCarryingValue" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="tcbk_FarmlandMember" abstract="true" name="FarmlandMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="tcbk_InvestmentSecuritiesLineItems" abstract="true" name="InvestmentSecuritiesLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="tcbk_BusinessDescriptionAndBasisOfPresentationPolicyTextBlock" abstract="false" name="BusinessDescriptionAndBasisOfPresentationPolicyTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType"/>
  <xs:element id="tcbk_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsCreditedFromDividends" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsCreditedFromDividends" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="tcbk_ForeclosedAssetsMember" abstract="true" name="ForeclosedAssetsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="tcbk_ScheduleOfWeightedAverageLeaseTermAndDiscountRateRelatedToOperatingLeaseTableTextBlock" abstract="false" name="ScheduleOfWeightedAverageLeaseTermAndDiscountRateRelatedToOperatingLeaseTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType"/>
  <xs:element id="tcbk_RegulatoryAssessmentsAndInsurance" abstract="false" name="RegulatoryAssessmentsAndInsurance" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <xs:element id="tcbk_FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairmentIncreaseDecrease" abstract="false" name="FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairmentIncreaseDecrease" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="tcbk_AgricultureProductionPortfolioSegmentMember" abstract="true" name="AgricultureProductionPortfolioSegmentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="tcbk_TwoThousandNineteenPlanMember" abstract="true" name="TwoThousandNineteenPlanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="tcbk_IncreaseDecreaseInAmortizationOfOperatingLeaseRightOfUseAsset" abstract="false" name="IncreaseDecreaseInAmortizationOfOperatingLeaseRightOfUseAsset" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="tcbk_MultifamilyCollateralMember" abstract="true" name="MultifamilyCollateralMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="tcbk_AgricultureLoanMember" abstract="true" name="AgricultureLoanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="tcbk_OffBalanceSheetCreditLossWriteoff" abstract="false" name="OffBalanceSheetCreditLossWriteoff" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="tcbk_NetworkCharges" abstract="false" name="NetworkCharges" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="tcbk_QuantitativeInformationFairValueMeasurementsForFinancialInstrumentsMeasuredAtFairValueOnNonrecurringBasisLevelThreeTableTextBlock" abstract="false" name="QuantitativeInformationFairValueMeasurementsForFinancialInstrumentsMeasuredAtFairValueOnNonrecurringBasisLevelThreeTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType"/>
  <xs:element id="tcbk_NumberOfCountiesBankOperates" abstract="false" name="NumberOfCountiesBankOperates" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="tcbk_FinancingReceivableOriginatedFourYearsOrMoreBeforeLatestFiscalYear" abstract="false" name="FinancingReceivableOriginatedFourYearsOrMoreBeforeLatestFiscalYear" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="tcbk_MortgageServicingRightsMember" abstract="true" name="MortgageServicingRightsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="tcbk_ChangeInMarketValueOfMortgageServicingRights" abstract="false" name="ChangeInMarketValueOfMortgageServicingRights" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="tcbk_AmortizedCostBasisOfCollateralDependentLoansTableTextBlock" abstract="false" name="AmortizedCostBasisOfCollateralDependentLoansTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType"/>
  <xs:element id="tcbk_OffBalanceSheetCreditLossLiabilityLineItems" abstract="true" name="OffBalanceSheetCreditLossLiabilityLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="tcbk_FinancingReceivableNumberOfLoansBalanceLessThan50000" abstract="false" name="FinancingReceivableNumberOfLoansBalanceLessThan50000" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="tcbk_ScheduleOfDepositsLineItems" abstract="true" name="ScheduleOfDepositsLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="tcbk_RepurchasedSharesPercentageOfTotalSharesOutstanding" abstract="false" name="RepurchasedSharesPercentageOfTotalSharesOutstanding" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="num:percentItemType"/>
  <xs:element id="tcbk_OtherTimeCertificatesDeposits" abstract="false" name="OtherTimeCertificatesDeposits" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="tcbk_GeographicalDescriptionsPolicyTextBlock" abstract="false" name="GeographicalDescriptionsPolicyTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType"/>
  <xs:element id="tcbk_FinancialImpactIncreaseDecreaseDueToTroubledDebtRestructureAdditionalProvision" abstract="false" name="FinancialImpactIncreaseDecreaseDueToTroubledDebtRestructureAdditionalProvision" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="tcbk_CashAtFederalReserveAndOtherBanks" abstract="false" name="CashAtFederalReserveAndOtherBanks" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="tcbk_OtherLoansMember" abstract="true" name="OtherLoansMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="tcbk_ProvisionForReversalOfBenefitFromLoanLossesExpensed" abstract="false" name="ProvisionForReversalOfBenefitFromLoanLossesExpensed" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="tcbk_CreditRatingDomain" abstract="true" name="CreditRatingDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="tcbk_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsIncreaseInPeriod" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsIncreaseInPeriod" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="tcbk_FinancingReceivableBeforeAllowanceForCreditLossBalanceLessThan50000" abstract="false" name="FinancingReceivableBeforeAllowanceForCreditLossBalanceLessThan50000" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="tcbk_SFRFirstDeedMember" abstract="true" name="SFRFirstDeedMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="tcbk_OtherComprehensiveIncomeLossJointBeneficiaryAgreementLiabilityAdjustmentsReclassificationNetOfTax" abstract="false" name="OtherComprehensiveIncomeLossJointBeneficiaryAgreementLiabilityAdjustmentsReclassificationNetOfTax" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="tcbk_ScheduleOfOtherNoninterestIncomeAndExpenseLineItems" abstract="true" name="ScheduleOfOtherNoninterestIncomeAndExpenseLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="tcbk_CoreDepositIntangible" abstract="false" name="CoreDepositIntangible" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="tcbk_FinancingReceivableDeferredLoanCosts" abstract="false" name="FinancingReceivableDeferredLoanCosts" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="tcbk_CumulativeEffectPeriodOfAdoptionAxis" abstract="true" name="CumulativeEffectPeriodOfAdoptionAxis" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType"/>
  <xs:element id="tcbk_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsOutstandingOptionPricePerShareOfOptionsForfeited" abstract="false" name="ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsOutstandingOptionPricePerShareOfOptionsForfeited" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="num:perShareItemType"/>
  <xs:element id="tcbk_LesseeOperatingLeaseNumberOfRenewalTermOptions" abstract="false" name="LesseeOperatingLeaseNumberOfRenewalTermOptions" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="tcbk_NumberOfLoanProductionOffices" abstract="false" name="NumberOfLoanProductionOffices" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="tcbk_ScheduleOfOtherNoninterestIncomeAndExpenseTable" abstract="true" name="ScheduleOfOtherNoninterestIncomeAndExpenseTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="tcbk_NumberOfSubsidiaryBusinessTrust" abstract="false" name="NumberOfSubsidiaryBusinessTrust" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="tcbk_AccountsReceivableAndInventoryMember" abstract="true" name="AccountsReceivableAndInventoryMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="tcbk_SignificantAccountingPoliciesTable" abstract="true" name="SignificantAccountingPoliciesTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="tcbk_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsOutstandingOptionPricePerShareOfOptionsGranted" abstract="false" name="ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsOutstandingOptionPricePerShareOfOptionsGranted" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="num:perShareItemType"/>
  <xs:element id="tcbk_BaselThreeFullyPhasedInMember" abstract="true" name="BaselThreeFullyPhasedInMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="tcbk_CreditLossAllowanceForCreditLoss" abstract="false" name="CreditLossAllowanceForCreditLoss" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="tcbk_NorthValleyBancorpMember" abstract="true" name="NorthValleyBancorpMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="tcbk_SignificantAccountingPoliciesLineItems" abstract="true" name="SignificantAccountingPoliciesLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="tcbk_ChangesInCaliforniaUnemploymentAndGrossDomesticProductMember" abstract="true" name="ChangesInCaliforniaUnemploymentAndGrossDomesticProductMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="tcbk_PaymentProtectionProgramPPPMember" abstract="true" name="PaymentProtectionProgramPPPMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="tcbk_PerformanceShareUnitsReleasedShares" abstract="false" name="PerformanceShareUnitsReleasedShares" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="tcbk_IndividuallyEvaluatedLoansMember" abstract="true" name="IndividuallyEvaluatedLoansMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="tcbk_CreditLossLineItems" abstract="true" name="CreditLossLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="tcbk_ScheduleOfDepositsTable" abstract="true" name="ScheduleOfDepositsTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="tcbk_CreditLossExpenseReversal" abstract="false" name="CreditLossExpenseReversal" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="tcbk_AccumulatedJointBeneficiaryAgreementLiabilityMember" abstract="true" name="AccumulatedJointBeneficiaryAgreementLiabilityMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="tcbk_FinancingReceivableNonaccrualIncludingGuaranteedLoans" abstract="false" name="FinancingReceivableNonaccrualIncludingGuaranteedLoans" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="tcbk_AssetManagementAndCommissionIncome" abstract="false" name="AssetManagementAndCommissionIncome" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="tcbk_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedOrExpiredInPeriod" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedOrExpiredInPeriod" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="tcbk_ConstructionPortfolioSegmentMember" abstract="true" name="ConstructionPortfolioSegmentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="tcbk_CumulativeEffectPeriodOfAdoptionAdjustmentMember" abstract="true" name="CumulativeEffectPeriodOfAdoptionAdjustmentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
</xs:schema>
