content: <?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>0001987346</cik>
            <ccc>XXXXXXXX</ccc>
          </filerCredentials>
        </filer>
        <liveTestFlag>LIVE</liveTestFlag>
  
  
      </filerInfo>
    </headerData>
    <formData>
      <issuerInfo>
        <issuerCik>0001710482</issuerCik>
        <issuerName>John Marshall Bancorp, Inc.</issuerName>
        <secFileNumber>001-41315</secFileNumber>
        <issuerAddress>
          <com:street1>1943 ISAAC NEWTON SQUARE</com:street1>
          <com:street2>SUITE 100</com:street2>
          <com:city>RESTON</com:city>
          <com:stateOrCountry>VA</com:stateOrCountry>
          <com:zipCode>20190</com:zipCode>
        </issuerAddress>
        <issuerContactPhone>703-584-0840</issuerContactPhone>
        <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>Nguonly Paul Lim</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
        <relationshipsToIssuer>
          <relationshipToIssuer>Director</relationshipToIssuer>
        </relationshipsToIssuer>
      </issuerInfo>
      <securitiesInformation>
        <securitiesClassTitle>COMMON STOCK</securitiesClassTitle>
        <brokerOrMarketmakerDetails>
          <name>TD AMERITRADE</name>
          <address>
            <com:street1>200 S 108TH AVE</com:street1>
            <com:city>OMAHA</com:city>
            <com:stateOrCountry>NE</com:stateOrCountry>
            <com:zipCode>68154</com:zipCode>
          </address>
        </brokerOrMarketmakerDetails>
        <noOfUnitsSold>5813</noOfUnitsSold>
        <aggregateMarketValue>100971.81</aggregateMarketValue>
        <noOfUnitsOutstanding>14126138</noOfUnitsOutstanding>
        <approxSaleDate>10/30/2023</approxSaleDate>
        <securitiesExchangeName>NASDAQ</securitiesExchangeName>
      </securitiesInformation>
      <securitiesToBeSold>
        <securitiesClassTitle>COMMON STOCK</securitiesClassTitle>
        <acquiredDate>05/21/2008</acquiredDate>
        <natureOfAcquisitionTransaction>PURCHASE</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>JOHN MARSHALL BANK</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>21712</amountOfSecuritiesAcquired>
        <paymentDate>05/21/2008</paymentDate>
        <natureOfPayment>CHECK</natureOfPayment>
      </securitiesToBeSold>
      <nothingToReportFlagOnSecuritiesSoldInPast3Months>N</nothingToReportFlagOnSecuritiesSoldInPast3Months>
      <securitiesSoldInPast3Months>
        <sellerDetails>
          <name>PAUL LIM NGUONLY</name>
          <address>
            <com:street1>4 LAUREL HILL CT</com:street1>
            <com:city>BLUFFTON</com:city>
            <com:stateOrCountry>SC</com:stateOrCountry>
            <com:zipCode>29910</com:zipCode>
          </address>
        </sellerDetails>
        <securitiesClassTitle>JMSB</securitiesClassTitle>
        <saleDate>08/01/2023</saleDate>
        <amountOfSecuritiesSold>2500</amountOfSecuritiesSold>
        <grossProceeds>48332.00</grossProceeds>
      </securitiesSoldInPast3Months>
      <securitiesSoldInPast3Months>
        <sellerDetails>
          <name>PAUL LIM NGUONLY</name>
          <address>
            <com:street1>4 LAUREL HILL CT</com:street1>
            <com:city>BLUFFTON</com:city>
            <com:stateOrCountry>SC</com:stateOrCountry>
            <com:zipCode>29910</com:zipCode>
          </address>
        </sellerDetails>
        <securitiesClassTitle>JMSB</securitiesClassTitle>
        <saleDate>08/07/2023</saleDate>
        <amountOfSecuritiesSold>211</amountOfSecuritiesSold>
        <grossProceeds>4219.00</grossProceeds>
      </securitiesSoldInPast3Months>
      <securitiesSoldInPast3Months>
        <sellerDetails>
          <name>PAUL LIM NGUONLY</name>
          <address>
            <com:street1>4 LAUREL HILL CT</com:street1>
            <com:city>BLUFFTON</com:city>
            <com:stateOrCountry>SC</com:stateOrCountry>
            <com:zipCode>29910</com:zipCode>
          </address>
        </sellerDetails>
        <securitiesClassTitle>JMSB</securitiesClassTitle>
        <saleDate>08/08/2023</saleDate>
        <amountOfSecuritiesSold>2289</amountOfSecuritiesSold>
        <grossProceeds>45779.00</grossProceeds>
      </securitiesSoldInPast3Months>
      <noticeSignature>
        <noticeDate>10/29/2023</noticeDate>
        <signature>PAUL LIM NGUONLY</signature>
      </noticeSignature>
    </formData>
  </edgarSubmission>
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text: 144
  0001987346
  XXXXXXXX
  LIVE
  0001710482
  John Marshall Bancorp, Inc.
  001-41315
  1943 ISAAC NEWTON SQUARE
  SUITE 100
  RESTON
  VA
  20190
  703-584-0840
  Nguonly Paul Lim
  Director
  COMMON STOCK
  TD AMERITRADE
  200 S 108TH AVE
  OMAHA
  NE
  68154
  5813
  100971.81
  14126138
  10/30/2023
  NASDAQ
  COMMON STOCK
  05/21/2008
  PURCHASE
  JOHN MARSHALL BANK
  N
  21712
  05/21/2008
  CHECK
  N
  PAUL LIM NGUONLY
  4 LAUREL HILL CT
  BLUFFTON
  SC
  29910
  JMSB
  08/01/2023
  2500
  48332.00
  PAUL LIM NGUONLY
  4 LAUREL HILL CT
  BLUFFTON
  SC
  29910
  JMSB
  08/07/2023
  211
  4219.00
  PAUL LIM NGUONLY
  4 LAUREL HILL CT
  BLUFFTON
  SC
  29910
  JMSB
  08/08/2023
  2289
  45779.00
  10/29/2023
  PAUL LIM NGUONLY