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<!-- DFIN ActiveDisclosure(SM) XBRL Schema Document - http://www.dfinsolutions.com/ -->
<!-- Creation Date      : 2020-11-05T23:24:58.9404063+00:00 -->
<!-- Version            : 5.0.1.513 -->
<!-- Package ID         : 1a8cda49736a4c229942f2afba6c6a12 -->
<!-- Copyright (c) 2020 Donnelley Financial Solutions, Inc. All Rights Reserved. -->
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  <xsd:element id="sf_InterestBearingAndTimeDepositOfOfficials" name="InterestBearingAndTimeDepositOfOfficials" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="sf_SecuritiesBorrowedGrossAmountsOffset" name="SecuritiesBorrowedGrossAmountsOffset" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit" />
  <xsd:element id="sf_SecuritiesBorrowedAmountNotOffsetAgainstCollateral" name="SecuritiesBorrowedAmountNotOffsetAgainstCollateral" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit" />
  <xsd:element id="sf_SecuritiesBorrowedNetAmount" name="SecuritiesBorrowedNetAmount" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit" />
  <xsd:element id="sf_OffsettingAssetsNetAmount" name="OffsettingAssetsNetAmount" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit" />
  <xsd:element id="sf_OffsettingAssets" name="OffsettingAssets" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit" />
  <xsd:element id="sf_OffsettingAssetsAmountsNotOffset" name="OffsettingAssetsAmountsNotOffset" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit" />
  <xsd:element id="sf_OffsettingAssetsCollateralReceived" name="OffsettingAssetsCollateralReceived" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="sf_OffsettingAssetsGrossAmountsOfRecognizedAssets" name="OffsettingAssetsGrossAmountsOfRecognizedAssets" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit" />
  <xsd:element id="sf_OffsettingAssetsGrossAmountsOffset" name="OffsettingAssetsGrossAmountsOffset" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit" />
  <xsd:element id="sf_CashFlowInterestRateContractsAssetNetAmount" name="CashFlowInterestRateContractsAssetNetAmount" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit" />
  <xsd:element id="sf_DerivativeLiabilityFairValueAmountOffsetAgainstCollateral" name="DerivativeLiabilityFairValueAmountOffsetAgainstCollateral" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="sf_SecuritiesPurchasedUnderAgreementsToResellNetAmount" name="SecuritiesPurchasedUnderAgreementsToResellNetAmount" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit" />
  <xsd:element id="sf_SecuritiesPurchasedUnderAgreementsToResellAmountsNotOffset" name="SecuritiesPurchasedUnderAgreementsToResellAmountsNotOffset" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit" />
  <xsd:element id="sf_SecuritiesPurchasedUnderAgreementsToGrossAmountsOffset" name="SecuritiesPurchasedUnderAgreementsToGrossAmountsOffset" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit" />
  <xsd:element id="sf_FairValueOfSecuritiesPledgedAsCollateralMember" name="FairValueOfSecuritiesPledgedAsCollateralMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="sf_SecuritiesLoanedGrossAmountsOffset" name="SecuritiesLoanedGrossAmountsOffset" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="sf_SecuritiesLoanedAmountNotOffsetAgainstCollateral" name="SecuritiesLoanedAmountNotOffsetAgainstCollateral" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="sf_SecuritiesLoanedNetAmount" name="SecuritiesLoanedNetAmount" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="sf_OffsettingLiabilitiesNetAmount" name="OffsettingLiabilitiesNetAmount" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="sf_OffsettingLiabilitiesNetAmountsPresentedInStatementOfFinancialCondition" name="OffsettingLiabilitiesNetAmountsPresentedInStatementOfFinancialCondition" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="sf_OffsettingLiabilitiesAmountsNotOffset" name="OffsettingLiabilitiesAmountsNotOffset" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="sf_OffsettingLiabilitiesCollateralPledged" name="OffsettingLiabilitiesCollateralPledged" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit" />
  <xsd:element id="sf_OffsettingLiabilitiesGrossAmountsOfRecognizedLiabilities" name="OffsettingLiabilitiesGrossAmountsOfRecognizedLiabilities" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="sf_OffsettingLiabilitiesGrossAmountsOffset" name="OffsettingLiabilitiesGrossAmountsOffset" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="sf_SecuritiesSoldUnderAgreementsToRepurchaseNetAmount" name="SecuritiesSoldUnderAgreementsToRepurchaseNetAmount" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="sf_SecuritiesSoldUnderAgreementsToRepurchaseAmountNotOffset" name="SecuritiesSoldUnderAgreementsToRepurchaseAmountNotOffset" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="sf_SecuritiesSoldUnderAgreementsToRepurchaseGrossAmountsOffset" name="SecuritiesSoldUnderAgreementsToRepurchaseGrossAmountsOffset" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="sf_USGovernmentAgencySecuritiesAndUSGovernmentSecuritiesAndCorporateFixedIncomeSecuritiesMember" name="USGovernmentAgencySecuritiesAndUSGovernmentSecuritiesAndCorporateFixedIncomeSecuritiesMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="sf_PurchaseCommitmentsMember" name="PurchaseCommitmentsMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="sf_ToBeAnnouncedSecurityContractsMember" name="ToBeAnnouncedSecurityContractsMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="sf_PercentageOfAggregateDebitBalances" name="PercentageOfAggregateDebitBalances" type="num:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" />
  <xsd:element id="sf_OurOtherBrokerDealerSubsidiariesMember" name="OurOtherBrokerDealerSubsidiariesMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="sf_StifelBankAndTrustMember" name="StifelBankAndTrustMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="sf_StifelBankMember" name="StifelBankMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="sf_RemainingLeaseTermOperatingLeases" name="RemainingLeaseTermOperatingLeases" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="sf_OfficeSpaceAndOfficeEquipmentMember" name="OfficeSpaceAndOfficeEquipmentMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="sf_OtherRevenueFromContractsWithCustomer" name="OtherRevenueFromContractsWithCustomer" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="sf_OtherSourcesOfRevenueAbstract" name="OtherSourcesOfRevenueAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="sf_OtherStatesMember" name="OtherStatesMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="sf_CapitalRaisingMember" name="CapitalRaisingMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="sf_AdvisoryFeesMember" name="AdvisoryFeesMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="sf_ImpairmentRelatedToReceivables" name="ImpairmentRelatedToReceivables" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit" />
  <xsd:element id="sf_MarginBalances" name="MarginBalances" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="sf_InterestIncomeFromFinancialInstrumentsOwned" name="InterestIncomeFromFinancialInstrumentsOwned" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="sf_OtherInterestAndDividendIncomeExpenseNet" name="OtherInterestAndDividendIncomeExpenseNet" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="sf_InterestIncomeExpenseOther" name="InterestIncomeExpenseOther" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit" />
  <xsd:element id="sf_DeferredAwardsMember" name="DeferredAwardsMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="sf_IncentiveStockPlanMember" name="IncentiveStockPlanMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="sf_RestrictedStockAwardMember" name="RestrictedStockAwardMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="sf_RestrictedStockUnitsPerformanceBasedRestrictedStockUnitsAndRestrictedStockAwardsMember" name="RestrictedStockUnitsPerformanceBasedRestrictedStockUnitsAndRestrictedStockAwardsMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="sf_PerformanceBasedRestrictedStockUnitsMember" name="PerformanceBasedRestrictedStockUnitsMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="sf_RestrictedStockUnitsAndRestrictedStockAwardsMember" name="RestrictedStockUnitsAndRestrictedStockAwardsMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="sf_StifelNicolausWealthAccumulationPlanMember" name="StifelNicolausWealthAccumulationPlanMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="sf_SharebasedCompensationArrangementByShareBasedPaymentAwardAwardSharesPotentiallyConvertedRangePercentage" name="SharebasedCompensationArrangementByShareBasedPaymentAwardAwardSharesPotentiallyConvertedRangePercentage" type="num:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="sf_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardPerformancePeriod" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardPerformancePeriod" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="sf_ElectiveDeferralsVestedPercentage" name="ElectiveDeferralsVestedPercentage" type="num:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" />
  <xsd:element id="sf_PercentageOfEarningsDeferredIntoCompanyStockUnitsAdditionalElectiveDeferral" name="PercentageOfEarningsDeferredIntoCompanyStockUnitsAdditionalElectiveDeferral" type="num:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="sf_PercentageOfEarningsDeferredIntoCompanyStockUnits" name="PercentageOfEarningsDeferredIntoCompanyStockUnits" type="num:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" />
  <xsd:element id="sf_GeneralSettlementPeriodOfSecuritiesTransactions" name="GeneralSettlementPeriodOfSecuritiesTransactions" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="sf_OutstandingCommitmentsToOriginateLoans" name="OutstandingCommitmentsToOriginateLoans" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="sf_UnusedLinesOfCreditToCommercialAndConsumerBorrowers" name="UnusedLinesOfCreditToCommercialAndConsumerBorrowers" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="sf_ExpectedCreditLossesForUnfundedCreditLoss" name="ExpectedCreditLossesForUnfundedCreditLoss" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="sf_ReserveForUnfundedCommitmentsForCreditLoss" name="ReserveForUnfundedCommitmentsForCreditLoss" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit" />
  <xsd:element id="sf_NumberOfBusinessesWithinOperatingSegment" name="NumberOfBusinessesWithinOperatingSegment" type="xbrli:integerItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="sf_NetRevenuesAccountedForByIndividualClientMaximumPercentage" name="NetRevenuesAccountedForByIndividualClientMaximumPercentage" type="num:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="sf_OtherCountriesMember" name="OtherCountriesMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="sf_BusinessBancsharesIncMember" name="BusinessBancsharesIncMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="sf_NoncumulativePerpetualSeriesCPreferredStockMember" name="NoncumulativePerpetualSeriesCPreferredStockMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="sf_NoncumulativePerpetualPreferredStockSeriesBMember" name="NoncumulativePerpetualPreferredStockSeriesBMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="sf_PreferredStockLiquidationPreferencePerDepositaryShare" name="PreferredStockLiquidationPreferencePerDepositaryShare" type="num:perShareItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" />
  <xsd:element id="sf_NumberOfTypesOfSubsequentEvents" name="NumberOfTypesOfSubsequentEvents" type="xbrli:integerItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
</xsd:schema>
