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

    <schemaVersion>X0603</schemaVersion>

    <submissionType>D/A</submissionType>

    <testOrLive>LIVE</testOrLive>

    <primaryIssuer>
        <cik>0001479965</cik>
        <entityName>Midland Acquisition Co LLC</entityName>
        <issuerAddress>
            <street1>ONE NORTH LEXINGTON AVENUE</street1>
            <street2>11TH FLOOR</street2>
            <city>WHITE PLAINS</city>
            <stateOrCountry>NY</stateOrCountry>
            <zipCode>10601</zipCode>
        </issuerAddress>
        <issuerPhoneNumber>9142200900</issuerPhoneNumber>
        <jurisdictionOfInc>DELAWARE</jurisdictionOfInc>
        <issuerPreviousNameList>
            <value>None</value>
        </issuerPreviousNameList>
        <edgarPreviousNameList>
            <value>None</value>
        </edgarPreviousNameList>
        <entityType>Limited Liability Company</entityType>
        <yearOfInc>
            <withinFiveYears>true</withinFiveYears>
            <value>2009</value>
        </yearOfInc>
    </primaryIssuer>

    <relatedPersonsList>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Nadeem</firstName>
                <lastName>Nisar</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>c/o MAC LLC, One North Lexington Avenue</street1>
                <street2>11th Floor</street2>
                <city>White Plains</city>
                <stateOrCountry>NY</stateOrCountry>
                <zipCode>10601</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Michael</firstName>
                <lastName>Newton</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>c/o MAC LLC, One North Lexington Avenue</street1>
                <street2>11th Floor</street2>
                <city>White Plains</city>
                <stateOrCountry>NY</stateOrCountry>
                <zipCode>10601</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Thomas</firstName>
                <lastName>Plant</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>c/o MAC LLC, One North Lexington Avenue</street1>
                <street2>11th Floor</street2>
                <city>White Plains</city>
                <stateOrCountry>NY</stateOrCountry>
                <zipCode>10601</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Robert</firstName>
                <lastName>Dunbar</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>c/o MAC LLC, One North Lexington Avenue</street1>
                <street2>11th Floor</street2>
                <city>White Plains</city>
                <stateOrCountry>NY</stateOrCountry>
                <zipCode>10601</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>James</firstName>
                <lastName>Henneforth</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>c/o MAC LLC, One North Lexington Avenue</street1>
                <street2>11th Floor</street2>
                <city>White Plains</city>
                <stateOrCountry>NY</stateOrCountry>
                <zipCode>10601</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification>Director of Managing Member of issuer, namely, MCV Holding Company LLC</relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Robert</firstName>
                <lastName>Freedline</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>c/o MAC LLC, One North Lexington Avenue</street1>
                <street2>11th Floor</street2>
                <city>White Plains</city>
                <stateOrCountry>NY</stateOrCountry>
                <zipCode>10601</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification>Executive Officer of Managing Member of issuer, namely, MCV Holding Company LLC</relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Gary</firstName>
                <lastName>Pasek</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>c/o MAC LLC, One North Lexington Avenue</street1>
                <street2>11th Floor</street2>
                <city>White Plains</city>
                <stateOrCountry>NY</stateOrCountry>
                <zipCode>10601</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification>Executive Officer of operating subsidiary of issuer, namely, Midland Cogeneration Venture Limited Partnership</relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Laurie</firstName>
                <lastName>Valasek</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>c/o MAC LLC, One North Lexington Avenue</street1>
                <street2>11th Floor</street2>
                <city>White Plains</city>
                <stateOrCountry>NY</stateOrCountry>
                <zipCode>10601</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification>Executive Officer of operating subsidiary of issuer, namely, Midland Cogeneration Venture Limited Partnership</relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Ulf</firstName>
                <lastName>Berg</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>c/o MAC LLC, One North Lexington Avenue</street1>
                <street2>11th Floor</street2>
                <city>White Plains</city>
                <stateOrCountry>NY</stateOrCountry>
                <zipCode>10601</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification>Director of Managing Member of issuer, namely, MCV Holding Company LLC</relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Mark</firstName>
                <lastName>Comora</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>c/o MAC LLC, One North Lexington Avenue</street1>
                <street2>11th Floor</street2>
                <city>White Plains</city>
                <stateOrCountry>NY</stateOrCountry>
                <zipCode>10601</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification>Director of Managing Member of issuer, namely, MCV Holding Company LLC</relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Geoffrey</firstName>
                <lastName>Roberts</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>c/o MAC LLC, One North Lexington Avenue</street1>
                <street2>11th Floor</street2>
                <city>White Plains</city>
                <stateOrCountry>NY</stateOrCountry>
                <zipCode>10601</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification>Director of Managing Member of issuer, namely, MCV Holding Company LLC</relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Glen</firstName>
                <lastName>Matsumoto</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>c/o MAC LLC, One North Lexington Avenue</street1>
                <street2>11th Floor</street2>
                <city>White Plains</city>
                <stateOrCountry>NY</stateOrCountry>
                <zipCode>10601</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification>Director of Managing Member of issuer, namely, MCV Holding Company LLC</relationshipClarification>
        </relatedPersonInfo>
    </relatedPersonsList>

    <offeringData>
        <industryGroup>
            <industryGroupType>Other Energy</industryGroupType>
        </industryGroup>
        <issuerSize>
            <revenueRange>Decline to Disclose</revenueRange>
        </issuerSize>
        <federalExemptionsExclusions>
            <item>05</item>
            <item>06</item>
            <item>46</item>
        </federalExemptionsExclusions>
        <typeOfFiling>
            <newOrAmendment>
                <isAmendment>true</isAmendment>
                <previousAccessionNumber>0001479965-10-000001</previousAccessionNumber>
            </newOrAmendment>
            <dateOfFirstSale>
                <value>2009-12-23</value>
            </dateOfFirstSale>
        </typeOfFiling>
        <durationOfOffering>
            <moreThanOneYear>true</moreThanOneYear>
        </durationOfOffering>
        <typesOfSecuritiesOffered>
            <isEquityType>true</isEquityType>
        </typesOfSecuritiesOffered>
        <businessCombinationTransaction>
            <isBusinessCombinationTransaction>false</isBusinessCombinationTransaction>
            <clarificationOfResponse></clarificationOfResponse>
        </businessCombinationTransaction>
        <minimumInvestmentAccepted>0</minimumInvestmentAccepted>
        <salesCompensationList></salesCompensationList>
        <offeringSalesAmounts>
            <totalOfferingAmount>4500000</totalOfferingAmount>
            <totalAmountSold>1425000</totalAmountSold>
            <totalRemaining>3075000</totalRemaining>
            <clarificationOfResponse></clarificationOfResponse>
        </offeringSalesAmounts>
        <investors>
            <hasNonAccreditedInvestors>true</hasNonAccreditedInvestors>
            <numberNonAccreditedInvestors>1</numberNonAccreditedInvestors>
            <totalNumberAlreadyInvested>6</totalNumberAlreadyInvested>
        </investors>
        <salesCommissionsFindersFees>
            <salesCommissions>
                <dollarAmount>0</dollarAmount>
            </salesCommissions>
            <findersFees>
                <dollarAmount>0</dollarAmount>
            </findersFees>
            <clarificationOfResponse></clarificationOfResponse>
        </salesCommissionsFindersFees>
        <useOfProceeds>
            <grossProceedsUsed>
                <dollarAmount>0</dollarAmount>
            </grossProceedsUsed>
            <clarificationOfResponse></clarificationOfResponse>
        </useOfProceeds>
        <signatureBlock>
            <authorizedRepresentative>false</authorizedRepresentative>
            <signature>
                <issuerName>Midland Acquisition Co LLC</issuerName>
                <signatureName>Andrew Ahonen</signatureName>
                <nameOfSigner>Andrew Ahonen</nameOfSigner>
                <signatureTitle>Duly Authorized Signing Person</signatureTitle>
                <signatureDate>2010-01-07</signatureDate>
            </signature>
        </signatureBlock>
    </offeringData>
</edgarSubmission>
