<?xml version="1.0" encoding="UTF-8"?><edgarSubmission xmlns="http://www.sec.gov/edgar/ownership" xmlns:com="http://www.sec.gov/edgar/common">
  <headerData>
    <submissionType>144</submissionType>
    <filerInfo>
      <filer>
        <filerCredentials>
          <cik>0001417351</cik>
          <ccc>XXXXXXXX</ccc>
        </filerCredentials>
      </filer>
      <liveTestFlag>LIVE</liveTestFlag>



    </filerInfo>
  </headerData>
  <formData>
    <issuerInfo>
      <issuerCik>0000101382</issuerCik>
      <issuerName>UMB FINANCIAL CORP</issuerName>
      <secFileNumber>001-38481</secFileNumber>
      <issuerAddress>
        <com:street1>1010 GRAND AVE</com:street1>
        <com:city>KANSAS CITY</com:city>
        <com:stateOrCountry>MO</com:stateOrCountry>
        <com:zipCode>64106</com:zipCode>
      </issuerAddress>
      <issuerContactPhone>8168607000</issuerContactPhone>
      <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>Gallagher Kevin Charles</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
      <relationshipsToIssuer>
        <relationshipToIssuer>Director</relationshipToIssuer>
      </relationshipsToIssuer>
    </issuerInfo>
    <securitiesInformation>
      <securitiesClassTitle>Common Stock</securitiesClassTitle>
      <brokerOrMarketmakerDetails>
        <name>UMB Financial Services, Inc.</name>
        <address>
          <com:street1>928 Grand Boulevard</com:street1>
          <com:street2>Fourth Floor</com:street2>
          <com:city>Kansas City</com:city>
          <com:stateOrCountry>MO</com:stateOrCountry>
          <com:zipCode>64106</com:zipCode>
        </address>
      </brokerOrMarketmakerDetails>
      <noOfUnitsSold>400</noOfUnitsSold>
      <aggregateMarketValue>52728.00</aggregateMarketValue>
      <noOfUnitsOutstanding>75978727</noOfUnitsOutstanding>
      <approxSaleDate>06/10/2026</approxSaleDate>
      <securitiesExchangeName>NASDAQ</securitiesExchangeName>
    </securitiesInformation>
    <securitiesToBeSold>
      <securitiesClassTitle>Common Stock</securitiesClassTitle>
      <acquiredDate>05/01/2026</acquiredDate>
      <natureOfAcquisitionTransaction>StockAward from Issuer for Service as a Director</natureOfAcquisitionTransaction>
      <nameOfPersonfromWhomAcquired>UMB Financial Corporation</nameOfPersonfromWhomAcquired>
      <isGiftTransaction>N</isGiftTransaction>
      <amountOfSecuritiesAcquired>116</amountOfSecuritiesAcquired>
      <paymentDate>12/31/2025</paymentDate>
      <natureOfPayment>Service as a Director During 2025</natureOfPayment>
    </securitiesToBeSold>
    <securitiesToBeSold>
      <securitiesClassTitle>Common Stock</securitiesClassTitle>
      <acquiredDate>01/30/2026</acquiredDate>
      <natureOfAcquisitionTransaction>Stock Award from Issuer for Service as a Director</natureOfAcquisitionTransaction>
      <nameOfPersonfromWhomAcquired>UMB Financial Corporation</nameOfPersonfromWhomAcquired>
      <isGiftTransaction>N</isGiftTransaction>
      <amountOfSecuritiesAcquired>786</amountOfSecuritiesAcquired>
      <paymentDate>12/31/2025</paymentDate>
      <natureOfPayment>Service as a Director During 2025</natureOfPayment>
    </securitiesToBeSold>
    <nothingToReportFlagOnSecuritiesSoldInPast3Months>Y</nothingToReportFlagOnSecuritiesSoldInPast3Months>
    <noticeSignature>
      <noticeDate>06/10/2026</noticeDate>
      <signature>Jason D. Bartel, by POA</signature>
    </noticeSignature>
  </formData>
</edgarSubmission>
