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  <xs:element id="rbb_AdvanceWithOneTimeCallOneYearLockOutMember" abstract="true" name="AdvanceWithOneTimeCallOneYearLockOutMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="rbb_AdvanceWithQuarterlyCallThreeMonthLockOutMember" abstract="true" name="AdvanceWithQuarterlyCallThreeMonthLockOutMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="rbb_AdvanceWithQuarterlyCallOneYearLockOutMember" abstract="true" name="AdvanceWithQuarterlyCallOneYearLockOutMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="rbb_CommitmentsToMakeLoansMember" abstract="true" name="CommitmentsToMakeLoansMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="rbb_CommercialAndSimilarLettersOfCreditMember" abstract="true" name="CommercialAndSimilarLettersOfCreditMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="rbb_AffordableHousingPartnershipsAndSbicFundsMember" abstract="true" name="AffordableHousingPartnershipsAndSbicFundsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="rbb_LesseeOperatingLeaseLiabilityToBePaidAfterYearFour" abstract="false" name="LesseeOperatingLeaseLiabilityToBePaidAfterYearFour" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="rbb_ExecutiveOfficersDirectorsAndTheirRelatedInterestsMember" abstract="true" name="ExecutiveOfficersDirectorsAndTheirRelatedInterestsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="rbb_PrincipalOfficersDirectorsAndTheirAffiliatesMember" abstract="true" name="PrincipalOfficersDirectorsAndTheirAffiliatesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="rbb_DirectorsAndTheirAffiliatesMember" abstract="true" name="DirectorsAndTheirAffiliatesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="rbb_UnfundedLoanCommitmentsAvailableToRelatedParties" abstract="false" name="UnfundedLoanCommitmentsAvailableToRelatedParties" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="rbb_The2017OmnibusStockIncentivePlanMember" abstract="true" name="The2017OmnibusStockIncentivePlanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="rbb_TimebasedRestrictedStockUnitsMember" abstract="true" name="TimebasedRestrictedStockUnitsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="rbb_PerformancebasedRestrictedStockUnitsMember" abstract="true" name="PerformancebasedRestrictedStockUnitsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="rbb_ShareBasedCompensationArrangementByShareBasedPaymentAwardCommonStockReservedAsPercentageOfIssuedAndOutstanding" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardCommonStockReservedAsPercentageOfIssuedAndOutstanding" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="rbb_RequiredAssetsToLiabilitiesRatioAfterDividendEffect" abstract="false" name="RequiredAssetsToLiabilitiesRatioAfterDividendEffect" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="rbb_RbbBancorpMember" abstract="true" name="RbbBancorpMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="rbb_RoyalBusinessBankMember" abstract="true" name="RoyalBusinessBankMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="rbb_TierOneLeverageCapitalRequiredPlusCapitalConservationBufferFullyPhasedInAmount" abstract="false" name="TierOneLeverageCapitalRequiredPlusCapitalConservationBufferFullyPhasedInAmount" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="rbb_TierOneLeverageCapitalRequiredPlusCapitalConservationBufferFullyPhasedInAverageAssets" abstract="false" name="TierOneLeverageCapitalRequiredPlusCapitalConservationBufferFullyPhasedInAverageAssets" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="rbb_CommonEquityTierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets" abstract="false" name="CommonEquityTierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="rbb_CommonEquityTierOneCapitalRequiredPlusCapitalConversationBufferFullyPhasedInAmount" abstract="false" name="CommonEquityTierOneCapitalRequiredPlusCapitalConversationBufferFullyPhasedInAmount" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="rbb_CommonEquityTierOneCapitalRequiredPlusCapitalConversationBufferFullyPhasedInToRiskWeightedAssets" abstract="false" name="CommonEquityTierOneCapitalRequiredPlusCapitalConversationBufferFullyPhasedInToRiskWeightedAssets" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:pureItemType"/>
  <xs:element id="rbb_TierOneRiskBasedCapitalRequiredPlusCapitalConversationBufferFullyPhasedInAmount" abstract="false" name="TierOneRiskBasedCapitalRequiredPlusCapitalConversationBufferFullyPhasedInAmount" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="rbb_TierOneRiskBasedCapitalRequiredPlusCapitalConversationBufferFullyPhasedInToRiskWeightedAssets" abstract="false" name="TierOneRiskBasedCapitalRequiredPlusCapitalConversationBufferFullyPhasedInToRiskWeightedAssets" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="rbb_CapitalRequiredForCapitalConversationBufferFullyPhasedInAmount" abstract="false" name="CapitalRequiredForCapitalConversationBufferFullyPhasedInAmount" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="rbb_CapitalRequiredForCapitalConversationBufferFullyPhasedInToRiskWeightedAssets" abstract="false" name="CapitalRequiredForCapitalConversationBufferFullyPhasedInToRiskWeightedAssets" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="rbb_CapitalConservationBuffer" abstract="false" name="CapitalConservationBuffer" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="rbb_MunicipalSecuritiesMember" abstract="true" name="MunicipalSecuritiesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="rbb_ForwardMortgageLoanSaleContractsMember" abstract="true" name="ForwardMortgageLoanSaleContractsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="rbb_OtherRealEstateOwnedMember" abstract="true" name="OtherRealEstateOwnedMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="rbb_MeasurementInputAdjustmentMember" abstract="true" name="MeasurementInputAdjustmentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="rbb_FairValueInputsLevel2AndLevel3Member" abstract="true" name="FairValueInputsLevel2AndLevel3Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="rbb_InterestReceivableFairValueDisclosure" abstract="false" name="InterestReceivableFairValueDisclosure" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="rbb_InterestPayableFairValueDisclosure" abstract="false" name="InterestPayableFairValueDisclosure" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="rbb_WeightedAverageNumberOfSharesImpact" abstract="false" name="WeightedAverageNumberOfSharesImpact" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="rbb_EmployeeRetentionCreditMember" abstract="true" name="EmployeeRetentionCreditMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="rbb_FeesAndServiceChargesOnDepositAccountsMember" abstract="true" name="FeesAndServiceChargesOnDepositAccountsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="rbb_OtherFeesMember" abstract="true" name="OtherFeesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="rbb_OtherServiceIncomeMember" abstract="true" name="OtherServiceIncomeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="rbb_SingleReportableSegmentMember" abstract="true" name="SingleReportableSegmentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="rbb_InterestAndDividendIncomeOperatingAndNonoperating" abstract="false" name="InterestAndDividendIncomeOperatingAndNonoperating" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="rbb_ProvisionForCreditLossesExpensed" abstract="false" name="ProvisionForCreditLossesExpensed" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="rbb_LoansHeldForInvestmentAndHeldForSaleGross" abstract="false" name="LoansHeldForInvestmentAndHeldForSaleGross" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="rbb_The2025RepurchasePlanMember" abstract="true" name="The2025RepurchasePlanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="rbb_The2026RepurchasePlanMember" abstract="true" name="The2026RepurchasePlanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="rbb_A2025And2026ShareRepurchaseProgramsMember" abstract="true" name="A2025And2026ShareRepurchaseProgramsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
</xs:schema>
