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

    <schemaVersion>X0706</schemaVersion>

    <submissionType>D/A</submissionType>

    <testOrLive>LIVE</testOrLive>

    <primaryIssuer>
        <cik>0001545489</cik>
        <entityName>ARC Energy Fund 7 United States Limited Partnership</entityName>
        <issuerAddress>
            <street1>SUITE 4300</street1>
            <street2>3RD AVENUE S.W.</street2>
            <city>CALGARY</city>
            <stateOrCountry>A0</stateOrCountry>
            <stateOrCountryDescription>ALBERTA, CANADA</stateOrCountryDescription>
            <zipCode>T2P 4H2</zipCode>
        </issuerAddress>
        <issuerPhoneNumber>403-292-0680</issuerPhoneNumber>
        <jurisdictionOfInc>ALBERTA, CANADA</jurisdictionOfInc>
        <issuerPreviousNameList>
            <value>None</value>
        </issuerPreviousNameList>
        <edgarPreviousNameList>
            <value>None</value>
        </edgarPreviousNameList>
        <entityType>Limited Partnership</entityType>
        <yearOfInc>
            <withinFiveYears>true</withinFiveYears>
            <value>2011</value>
        </yearOfInc>
    </primaryIssuer>

    <relatedPersonsList>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Limited Partnership</firstName>
                <lastName>ARC Equity Management (Fund 7)</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>Suite 4300</street1>
                <street2>3rd Avenue S.W.</street2>
                <city>Calgary</city>
                <stateOrCountry>A0</stateOrCountry>
                <stateOrCountryDescription>ALBERTA, CANADA</stateOrCountryDescription>
                <zipCode>T2P 4H2</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification>General Partner of the Issuer</relationshipClarification>
        </relatedPersonInfo>
    </relatedPersonsList>

    <offeringData>
        <industryGroup>
            <industryGroupType>Pooled Investment Fund</industryGroupType>
            <investmentFundInfo>
                <investmentFundType>Venture Capital Fund</investmentFundType>
                <is40Act>false</is40Act>
            </investmentFundInfo>
        </industryGroup>
        <issuerSize>
            <revenueRange>Not Applicable</revenueRange>
        </issuerSize>
        <federalExemptionsExclusions>
            <item>06</item>
            <item>3C</item>
            <item>3C.7</item>
        </federalExemptionsExclusions>
        <typeOfFiling>
            <newOrAmendment>
                <isAmendment>true</isAmendment>
                <previousAccessionNumber>0001545489-12-000001</previousAccessionNumber>
            </newOrAmendment>
            <dateOfFirstSale>
                <value>2012-03-15</value>
            </dateOfFirstSale>
        </typeOfFiling>
        <durationOfOffering>
            <moreThanOneYear>false</moreThanOneYear>
        </durationOfOffering>
        <typesOfSecuritiesOffered>
            <isPooledInvestmentFundType>true</isPooledInvestmentFundType>
        </typesOfSecuritiesOffered>
        <businessCombinationTransaction>
            <isBusinessCombinationTransaction>false</isBusinessCombinationTransaction>
            <clarificationOfResponse></clarificationOfResponse>
        </businessCombinationTransaction>
        <minimumInvestmentAccepted>0</minimumInvestmentAccepted>
        <salesCompensationList>
            <recipient>
                <recipientName>Atlantic-Pacific Capital, Inc.</recipientName>
                <recipientCRDNumber>38356</recipientCRDNumber>
                <associatedBDName>None</associatedBDName>
                <associatedBDCRDNumber>None</associatedBDCRDNumber>
                <recipientAddress>
                    <street1>102 Greenwich Avenue</street1>
                    <street2>2nd Floor</street2>
                    <city>Greenwich</city>
                    <stateOrCountry>CT</stateOrCountry>
                    <stateOrCountryDescription>CONNECTICUT</stateOrCountryDescription>
                    <zipCode>06820</zipCode>
                </recipientAddress>
                <statesOfSolicitationList>
                    <value>All States</value>
                </statesOfSolicitationList>
                <foreignSolicitation>false</foreignSolicitation>
            </recipient>
        </salesCompensationList>
        <offeringSalesAmounts>
            <totalOfferingAmount>560510184</totalOfferingAmount>
            <totalAmountSold>560510184</totalAmountSold>
            <totalRemaining>0</totalRemaining>
            <clarificationOfResponse></clarificationOfResponse>
        </offeringSalesAmounts>
        <investors>
            <hasNonAccreditedInvestors>false</hasNonAccreditedInvestors>
            <totalNumberAlreadyInvested>50</totalNumberAlreadyInvested>
        </investors>
        <salesCommissionsFindersFees>
            <salesCommissions>
                <dollarAmount>2353622</dollarAmount>
                <isEstimate>true</isEstimate>
            </salesCommissions>
            <findersFees>
                <dollarAmount>0</dollarAmount>
            </findersFees>
            <clarificationOfResponse></clarificationOfResponse>
        </salesCommissionsFindersFees>
        <useOfProceeds>
            <grossProceedsUsed>
                <dollarAmount>0</dollarAmount>
            </grossProceedsUsed>
            <clarificationOfResponse>Net proceeds are expected to be used for working capital, including reimbursement of certain organizational expenses incurred by the GP and its affiliates.</clarificationOfResponse>
        </useOfProceeds>
        <signatureBlock>
            <authorizedRepresentative>false</authorizedRepresentative>
            <signature>
                <issuerName>ARC Energy Fund 7 United States Limited Partnership</issuerName>
                <signatureName>/s/ Tanya Causgrove</signatureName>
                <nameOfSigner>Tanya Causgrove</nameOfSigner>
                <signatureTitle>Chief Financial Officer</signatureTitle>
                <signatureDate>2012-07-24</signatureDate>
            </signature>
        </signatureBlock>
    </offeringData>
</edgarSubmission>
