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

    <schemaVersion>X0704</schemaVersion>

    <submissionType>D</submissionType>

    <testOrLive>LIVE</testOrLive>

    <primaryIssuer>
        <cik>0001267553</cik>
        <entityName>THOMAS ENGINE CO LLC</entityName>
        <issuerAddress>
            <street1>939 PEARL STREET</street1>
            <street2>SUITE 210</street2>
            <city>BOULDER</city>
            <stateOrCountry>CO</stateOrCountry>
            <stateOrCountryDescription>COLORADO</stateOrCountryDescription>
            <zipCode>80302</zipCode>
        </issuerAddress>
        <issuerPhoneNumber>3034424565</issuerPhoneNumber>
        <jurisdictionOfInc>LOUISIANA</jurisdictionOfInc>
        <issuerPreviousNameList>
            <value>None</value>
        </issuerPreviousNameList>
        <edgarPreviousNameList>
            <value>None</value>
        </edgarPreviousNameList>
        <entityType>Limited Liability Company</entityType>
        <yearOfInc>
            <overFiveYears>true</overFiveYears>
        </yearOfInc>
    </primaryIssuer>

    <relatedPersonsList>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>C.</firstName>
                <middleName>Russell</middleName>
                <lastName>Thomas</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>939 Pearl Street</street1>
                <street2>Suite 210</street2>
                <city>Boulder</city>
                <stateOrCountry>CO</stateOrCountry>
                <stateOrCountryDescription>COLORADO</stateOrCountryDescription>
                <zipCode>80302</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
                <relationship>Director</relationship>
                <relationship>Promoter</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Eben</firstName>
                <middleName>O.</middleName>
                <lastName>Johnson</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>939 Pearl Street</street1>
                <street2>Suite 210</street2>
                <city>Boulder</city>
                <stateOrCountry>CO</stateOrCountry>
                <stateOrCountryDescription>COLORADO</stateOrCountryDescription>
                <zipCode>80302</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Kendall</firstName>
                <middleName>T.</middleName>
                <lastName>Blake</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>506 Roses Bluff Drive</street1>
                <city>Madison</city>
                <stateOrCountry>MS</stateOrCountry>
                <stateOrCountryDescription>MISSISSIPPI</stateOrCountryDescription>
                <zipCode>39110</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>George</firstName>
                <middleName>W.</middleName>
                <lastName>Dettloff</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>46815 Port Street</street1>
                <city>Plymouth</city>
                <stateOrCountry>MI</stateOrCountry>
                <stateOrCountryDescription>MICHIGAN</stateOrCountryDescription>
                <zipCode>48170</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
    </relatedPersonsList>

    <offeringData>
        <industryGroup>
            <industryGroupType>Other Technology</industryGroupType>
        </industryGroup>
        <issuerSize>
            <revenueRange>No Revenues</revenueRange>
        </issuerSize>
        <federalExemptionsExclusions>
            <item>06</item>
        </federalExemptionsExclusions>
        <typeOfFiling>
            <newOrAmendment>
                <isAmendment>false</isAmendment>
            </newOrAmendment>
            <dateOfFirstSale>
                <value>2010-06-15</value>
            </dateOfFirstSale>
        </typeOfFiling>
        <durationOfOffering>
            <moreThanOneYear>false</moreThanOneYear>
        </durationOfOffering>
        <typesOfSecuritiesOffered>
            <isEquityType>true</isEquityType>
        </typesOfSecuritiesOffered>
        <businessCombinationTransaction>
            <isBusinessCombinationTransaction>false</isBusinessCombinationTransaction>
            <clarificationOfResponse></clarificationOfResponse>
        </businessCombinationTransaction>
        <minimumInvestmentAccepted>0</minimumInvestmentAccepted>
        <salesCompensationList></salesCompensationList>
        <offeringSalesAmounts>
            <totalOfferingAmount>2500000</totalOfferingAmount>
            <totalAmountSold>25000</totalAmountSold>
            <totalRemaining>2475000</totalRemaining>
            <clarificationOfResponse>Issuer may increase total offering amount in its discretion.In addition shares are being offered in exchange for issuer's convertible promissory notes ($1,135,000 aggregate principal plus accrued interest) with each share valued for these purposes at $10.</clarificationOfResponse>
        </offeringSalesAmounts>
        <investors>
            <hasNonAccreditedInvestors>false</hasNonAccreditedInvestors>
            <totalNumberAlreadyInvested>1</totalNumberAlreadyInvested>
        </investors>
        <salesCommissionsFindersFees>
            <salesCommissions>
                <dollarAmount>0</dollarAmount>
            </salesCommissions>
            <findersFees>
                <dollarAmount>0</dollarAmount>
            </findersFees>
            <clarificationOfResponse></clarificationOfResponse>
        </salesCommissionsFindersFees>
        <useOfProceeds>
            <grossProceedsUsed>
                <dollarAmount>200000</dollarAmount>
            </grossProceedsUsed>
            <clarificationOfResponse></clarificationOfResponse>
        </useOfProceeds>
        <signatureBlock>
            <authorizedRepresentative>false</authorizedRepresentative>
            <signature>
                <issuerName>THOMAS ENGINE CO LLC</issuerName>
                <signatureName>/s/ Eben O. Johnson</signatureName>
                <nameOfSigner>Eben O. Johnson</nameOfSigner>
                <signatureTitle>Chief Executive Officer</signatureTitle>
                <signatureDate>2010-06-30</signatureDate>
            </signature>
        </signatureBlock>
    </offeringData>
</edgarSubmission>
