<?xml version="1.0"?>
<edgarSubmission>

    <schemaVersion>X0708</schemaVersion>

    <submissionType>D</submissionType>

    <testOrLive>LIVE</testOrLive>

    <primaryIssuer>
        <cik>0001710482</cik>
        <entityName>John Marshall Bancorp, Inc.</entityName>
        <issuerAddress>
            <street1>1943 ISAAC NEWTON SQUARE</street1>
            <street2>SUITE 100</street2>
            <city>RESTON</city>
            <stateOrCountry>VA</stateOrCountry>
            <stateOrCountryDescription>VIRGINIA</stateOrCountryDescription>
            <zipCode>20190</zipCode>
        </issuerAddress>
        <issuerPhoneNumber>703-584-0840</issuerPhoneNumber>
        <jurisdictionOfInc>VIRGINIA</jurisdictionOfInc>
        <issuerPreviousNameList>
            <value>None</value>
        </issuerPreviousNameList>
        <edgarPreviousNameList>
            <value>None</value>
        </edgarPreviousNameList>
        <entityType>Corporation</entityType>
        <yearOfInc>
            <overFiveYears>true</overFiveYears>
        </yearOfInc>
    </primaryIssuer>

    <relatedPersonsList>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Christopher</firstName>
                <middleName>W.</middleName>
                <lastName>Bergstrom</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>1943 Isaac Newton Square</street1>
                <street2>Suite 100</street2>
                <city>Reston</city>
                <stateOrCountry>VA</stateOrCountry>
                <stateOrCountryDescription>VIRGINIA</stateOrCountryDescription>
                <zipCode>20190</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Kent</firstName>
                <middleName>D.</middleName>
                <lastName>Carstater</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>1943 Isaac Newton Square</street1>
                <street2>Suite 100</street2>
                <city>Reston</city>
                <stateOrCountry>VA</stateOrCountry>
                <stateOrCountryDescription>VIRGINIA</stateOrCountryDescription>
                <zipCode>20190</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
            </relatedPersonRelationshipList>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Andrew</firstName>
                <middleName>J.</middleName>
                <lastName>Peden</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>1943 Isaac Newton Square</street1>
                <street2>Suite 100</street2>
                <city>Reston</city>
                <stateOrCountry>VA</stateOrCountry>
                <stateOrCountryDescription>VIRGINIA</stateOrCountryDescription>
                <zipCode>20190</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
            </relatedPersonRelationshipList>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Kelly</firstName>
                <middleName>J.</middleName>
                <lastName>Bell</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>1943 Isaac Newton Square</street1>
                <street2>Suite 100</street2>
                <city>Reston</city>
                <stateOrCountry>VA</stateOrCountry>
                <stateOrCountryDescription>VIRGINIA</stateOrCountryDescription>
                <zipCode>20190</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
            </relatedPersonRelationshipList>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Jonathan</firstName>
                <middleName>C.</middleName>
                <lastName>Kinney</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>1943 Isaac Newton Square</street1>
                <street2>Suite 100</street2>
                <city>Reston</city>
                <stateOrCountry>VA</stateOrCountry>
                <stateOrCountryDescription>VIRGINIA</stateOrCountryDescription>
                <zipCode>20190</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Philip</firstName>
                <middleName>W.</middleName>
                <lastName>Allin</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>1943 Isaac Newton Square</street1>
                <street2>Suite 100</street2>
                <city>Reston</city>
                <stateOrCountry>VA</stateOrCountry>
                <stateOrCountryDescription>VIRGINIA</stateOrCountryDescription>
                <zipCode>20190</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Philip</firstName>
                <middleName>R.</middleName>
                <lastName>Chase</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>1943 Isaac Newton Square</street1>
                <street2>Suite 100</street2>
                <city>Reston</city>
                <stateOrCountry>VA</stateOrCountry>
                <stateOrCountryDescription>VIRGINIA</stateOrCountryDescription>
                <zipCode>20190</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Jean</firstName>
                <middleName>M.</middleName>
                <lastName>Edelman</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>1943 Isaac Newton Square</street1>
                <street2>Suite 100</street2>
                <city>Reston</city>
                <stateOrCountry>VA</stateOrCountry>
                <stateOrCountryDescription>VIRGINIA</stateOrCountryDescription>
                <zipCode>20190</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Michael</firstName>
                <middleName>T.</middleName>
                <lastName>Foster</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>1943 Isaac Newton Square</street1>
                <street2>Suite 100</street2>
                <city>Reston</city>
                <stateOrCountry>VA</stateOrCountry>
                <stateOrCountryDescription>VIRGINIA</stateOrCountryDescription>
                <zipCode>20190</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Michael</firstName>
                <middleName>A.</middleName>
                <lastName>Garcia</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>1943 Isaac Newton Square</street1>
                <street2>Suite 100</street2>
                <city>Reston</city>
                <stateOrCountry>VA</stateOrCountry>
                <stateOrCountryDescription>VIRGINIA</stateOrCountryDescription>
                <zipCode>20190</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Subhash</firstName>
                <middleName>K.</middleName>
                <lastName>Garg</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>1943 Isaac Newton Square</street1>
                <street2>Suite 100</street2>
                <city>Reston</city>
                <stateOrCountry>VA</stateOrCountry>
                <stateOrCountryDescription>VIRGINIA</stateOrCountryDescription>
                <zipCode>20190</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Ronald</firstName>
                <middleName>J.</middleName>
                <lastName>Gordon</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>1943 Isaac Newton Square</street1>
                <street2>Suite 100</street2>
                <city>Reston</city>
                <stateOrCountry>VA</stateOrCountry>
                <stateOrCountryDescription>VIRGINIA</stateOrCountryDescription>
                <zipCode>20190</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>O.</firstName>
                <middleName>Leland</middleName>
                <lastName>Mahan</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>1943 Isaac Newton Square</street1>
                <street2>Suite 100</street2>
                <city>Reston</city>
                <stateOrCountry>VA</stateOrCountry>
                <stateOrCountryDescription>VIRGINIA</stateOrCountryDescription>
                <zipCode>20190</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Lim</firstName>
                <middleName>P.</middleName>
                <lastName>Nguonly</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>1943 Isaac Newton Square</street1>
                <street2>Suite 100</street2>
                <city>Reston</city>
                <stateOrCountry>VA</stateOrCountry>
                <stateOrCountryDescription>VIRGINIA</stateOrCountryDescription>
                <zipCode>20190</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
        </relatedPersonInfo>
    </relatedPersonsList>

    <offeringData>
        <industryGroup>
            <industryGroupType>Commercial Banking</industryGroupType>
        </industryGroup>
        <issuerSize>
            <revenueRange>Decline to Disclose</revenueRange>
        </issuerSize>
        <federalExemptionsExclusions>
            <item>06b</item>
        </federalExemptionsExclusions>
        <typeOfFiling>
            <newOrAmendment>
                <isAmendment>false</isAmendment>
            </newOrAmendment>
            <dateOfFirstSale>
                <value>2022-06-15</value>
            </dateOfFirstSale>
        </typeOfFiling>
        <durationOfOffering>
            <moreThanOneYear>false</moreThanOneYear>
        </durationOfOffering>
        <typesOfSecuritiesOffered>
            <isDebtType>true</isDebtType>
        </typesOfSecuritiesOffered>
        <businessCombinationTransaction>
            <isBusinessCombinationTransaction>false</isBusinessCombinationTransaction>
        </businessCombinationTransaction>
        <minimumInvestmentAccepted>0</minimumInvestmentAccepted>
        <salesCompensationList>
            <recipient>
                <recipientName>Keefe, Bruyette &amp; Woods, Inc.</recipientName>
                <recipientCRDNumber>481</recipientCRDNumber>
                <associatedBDName>None</associatedBDName>
                <associatedBDCRDNumber>None</associatedBDCRDNumber>
                <recipientAddress>
                    <street1>787 Seventh Avenue</street1>
                    <street2>Fourth Floor</street2>
                    <city>New York</city>
                    <stateOrCountry>NY</stateOrCountry>
                    <stateOrCountryDescription>NEW YORK</stateOrCountryDescription>
                    <zipCode>10019</zipCode>
                </recipientAddress>
                <statesOfSolicitationList>
                    <state>MO</state>
                    <description>MISSOURI</description>
                </statesOfSolicitationList>
                <foreignSolicitation>false</foreignSolicitation>
            </recipient>
        </salesCompensationList>
        <offeringSalesAmounts>
            <totalOfferingAmount>25000000</totalOfferingAmount>
            <totalAmountSold>25000000</totalAmountSold>
            <totalRemaining>0</totalRemaining>
        </offeringSalesAmounts>
        <investors>
            <hasNonAccreditedInvestors>false</hasNonAccreditedInvestors>
            <totalNumberAlreadyInvested>1</totalNumberAlreadyInvested>
        </investors>
        <salesCommissionsFindersFees>
            <salesCommissions>
                <dollarAmount>375000</dollarAmount>
            </salesCommissions>
            <findersFees>
                <dollarAmount>0</dollarAmount>
            </findersFees>
        </salesCommissionsFindersFees>
        <useOfProceeds>
            <grossProceedsUsed>
                <dollarAmount>0</dollarAmount>
            </grossProceedsUsed>
        </useOfProceeds>
        <signatureBlock>
            <authorizedRepresentative>false</authorizedRepresentative>
            <signature>
                <issuerName>John Marshall Bancorp, Inc.</issuerName>
                <signatureName>/s/ Kent D. Carstater</signatureName>
                <nameOfSigner>Kent D. Carstater</nameOfSigner>
                <signatureTitle>Executive Vice President &amp; CFO</signatureTitle>
                <signatureDate>2022-06-17</signatureDate>
            </signature>
        </signatureBlock>
    </offeringData>
</edgarSubmission>