<?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>0001898828</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>Mahan Oscar Leland</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
      <relationshipsToIssuer>
        <relationshipToIssuer>Director</relationshipToIssuer>
      </relationshipsToIssuer>
    </issuerInfo>
    <securitiesInformation>
      <securitiesClassTitle>Common</securitiesClassTitle>
      <brokerOrMarketmakerDetails>
        <name>Charles Schwab Corp.</name>
        <address>
          <com:street1>3000 Schwab Way</com:street1>
          <com:city>Westlake</com:city>
          <com:stateOrCountry>TX</com:stateOrCountry>
          <com:zipCode>80134</com:zipCode>
        </address>
      </brokerOrMarketmakerDetails>
      <noOfUnitsSold>20000</noOfUnitsSold>
      <aggregateMarketValue>559200.00</aggregateMarketValue>
      <noOfUnitsOutstanding>14240213</noOfUnitsOutstanding>
      <approxSaleDate>11/18/2024</approxSaleDate>
      <securitiesExchangeName>Nasdaq</securitiesExchangeName>
    </securitiesInformation>
    <securitiesToBeSold>
      <securitiesClassTitle>Common</securitiesClassTitle>
      <acquiredDate>01/25/2018</acquiredDate>
      <natureOfAcquisitionTransaction>Various: Stock Grants, Stock Option Exercises</natureOfAcquisitionTransaction>
      <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
      <isGiftTransaction>N</isGiftTransaction>
      <amountOfSecuritiesAcquired>20000</amountOfSecuritiesAcquired>
      <paymentDate>01/25/2018</paymentDate>
      <natureOfPayment>Equity Compensation</natureOfPayment>
    </securitiesToBeSold>
    <nothingToReportFlagOnSecuritiesSoldInPast3Months>Y</nothingToReportFlagOnSecuritiesSoldInPast3Months>
    <remarks>Client acquired stock over a period of time between 1/25/2018 thru 8/14/2024 by various methods of vested Stock Grants and Stock Option exercises.</remarks>
    <noticeSignature>
      <noticeDate>11/18/2024</noticeDate>
      <signature>Oscar Leland Mahan</signature>
    </noticeSignature>
  </formData>
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144
0001898828
XXXXXXXX
LIVE
0001710482
John Marshall Bancorp, Inc.
001-41315
1943 ISAAC NEWTON SQUARE
SUITE 100
RESTON
VA
20190
703-584-0840
Mahan Oscar Leland
Director
Common
Charles Schwab Corp.
3000 Schwab Way
Westlake
TX
80134
20000
559200.00
14240213
11/18/2024
Nasdaq
Common
01/25/2018
Various: Stock Grants, Stock Option Exercises
Issuer
N
20000
01/25/2018
Equity Compensation
Y
Client acquired stock over a period of time between 1/25/2018 thru 8/14/2024 by various methods of vested Stock Grants and Stock Option exercises.
11/18/2024
Oscar Leland Mahan