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

    <schemaVersion>X0704</schemaVersion>

    <submissionType>D/A</submissionType>

    <testOrLive>LIVE</testOrLive>

    <primaryIssuer>
        <cik>0001457158</cik>
        <entityName>RCP Secondary Opportunity Fund LP</entityName>
        <issuerAddress>
            <street1>C/O RCP ADVISORS LLC</street1>
            <street2>100 N. RIVERSIDE PLAZA, SUITE 2400</street2>
            <city>CHICAGO</city>
            <stateOrCountry>IL</stateOrCountry>
            <stateOrCountryDescription>ILLINOIS</stateOrCountryDescription>
            <zipCode>60606-1519</zipCode>
        </issuerAddress>
        <issuerPhoneNumber>3122667300</issuerPhoneNumber>
        <jurisdictionOfInc>DELAWARE</jurisdictionOfInc>
        <issuerPreviousNameList>
            <value>None</value>
        </issuerPreviousNameList>
        <edgarPreviousNameList>
            <value>None</value>
        </edgarPreviousNameList>
        <entityType>Limited Partnership</entityType>
        <yearOfInc>
            <withinFiveYears>true</withinFiveYears>
            <value>2008</value>
        </yearOfInc>
    </primaryIssuer>

    <issuerList>
        <issuer>
            <cik>0001464909</cik>
            <entityName>RCP SOF Feeder, Ltd.</entityName>
            <issuerAddress>
                <street1>C/O RCP ADVISORS LLC</street1>
                <street2>100 N. RIVERSIDE PLAZA, SUITE 2400</street2>
                <city>CHICAGO</city>
                <stateOrCountry>IL</stateOrCountry>
                <stateOrCountryDescription>ILLINOIS</stateOrCountryDescription>
                <zipCode>60606-1519</zipCode>
            </issuerAddress>
            <issuerPhoneNumber>312-266-7300</issuerPhoneNumber>
            <jurisdictionOfInc>CAYMAN ISLANDS</jurisdictionOfInc>
            <issuerPreviousNameList>
                <value>None</value>
            </issuerPreviousNameList>
            <edgarPreviousNameList>
                <value>None</value>
            </edgarPreviousNameList>
            <entityType>Other</entityType>
            <entityTypeOtherDesc>Cayman Exempted Company</entityTypeOtherDesc>
            <yearOfInc>
                <withinFiveYears>true</withinFiveYears>
                <value>2009</value>
            </yearOfInc>
        </issuer>
    </issuerList>

    <relatedPersonsList>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Thomas Jr.</firstName>
                <middleName>P.</middleName>
                <lastName>Danis</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>c/o RCP Advisors LLC</street1>
                <street2>100 N. Riverside Plaza, Suite 2400</street2>
                <city>Chicago</city>
                <stateOrCountry>IL</stateOrCountry>
                <stateOrCountryDescription>ILLINOIS</stateOrCountryDescription>
                <zipCode>60606-1519</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification>Member of Board of Managers of RCP-SOF, LLC, the General Partner of the Issuer.</relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Thomas Sr.</firstName>
                <middleName>P.</middleName>
                <lastName>Danis</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>c/o RCP Advisors LLC</street1>
                <street2>100 N. Riverside Plaza, Suite 2400</street2>
                <city>Chicago</city>
                <stateOrCountry>IL</stateOrCountry>
                <stateOrCountryDescription>ILLINOIS</stateOrCountryDescription>
                <zipCode>60606-1519</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification>Member of Board of Managers of RCP-SOF, LLC, the General Partner of the Issuer.</relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Jeff</firstName>
                <middleName>P.</middleName>
                <lastName>Gehl</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>c/o RCP Advisors LLC</street1>
                <street2>100 N. Riverside Plaza, Suite 2400</street2>
                <city>Chicago</city>
                <stateOrCountry>IL</stateOrCountry>
                <stateOrCountryDescription>ILLINOIS</stateOrCountryDescription>
                <zipCode>60606-1519</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification>Member of Board of Managers of RCP-SOF, LLC, the General Partner of the Issuer.</relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Charles</firstName>
                <middleName>K.</middleName>
                <lastName>Huebner</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>c/o RCP Advisors LLC</street1>
                <street2>100 N. Riverside Plaza, Suite 2400</street2>
                <city>Chicago</city>
                <stateOrCountry>IL</stateOrCountry>
                <stateOrCountryDescription>ILLINOIS</stateOrCountryDescription>
                <zipCode>60606-1519</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification>Member of Board of Managers of RCP-SOF, LLC, the General Partner of the Issuer.</relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Don</firstName>
                <lastName>Seymour</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>DMS House, 20 Genesis Close</street1>
                <street2>P.O. Box 31910</street2>
                <city>Grand Cayman</city>
                <stateOrCountry>E9</stateOrCountry>
                <stateOrCountryDescription>CAYMAN ISLANDS</stateOrCountryDescription>
                <zipCode>KY1-1208</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification>Authorized signatory of Cayman Private Manager I Ltd., sole director of the Issuer.</relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Aldo</firstName>
                <lastName>Ghisletta</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>DMS House, 20 Genesis Close</street1>
                <street2>P.O. Box 31910</street2>
                <city>Grand Cayman</city>
                <stateOrCountry>E9</stateOrCountry>
                <stateOrCountryDescription>CAYMAN ISLANDS</stateOrCountryDescription>
                <zipCode>KY1-1208</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification>Authorized signatory of Cayman Private Manager I Ltd., sole director of the Issuer.</relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Tammy</firstName>
                <lastName>Seymour</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>DMS House, 20 Genesis Close</street1>
                <street2>P.O. Box 31910</street2>
                <city>Grand Cayman</city>
                <stateOrCountry>E9</stateOrCountry>
                <stateOrCountryDescription>CAYMAN ISLANDS</stateOrCountryDescription>
                <zipCode>KY1-1208</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification>Authorized signatory of Cayman Private Manager I Ltd., sole director of the Issuer.</relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Roger</firstName>
                <middleName>H.</middleName>
                <lastName>Hanson</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>DMS House, 20 Genesis Close</street1>
                <street2>P.O. Box 31910</street2>
                <city>Grand Cayman</city>
                <stateOrCountry>E9</stateOrCountry>
                <stateOrCountryDescription>CAYMAN ISLANDS</stateOrCountryDescription>
                <zipCode>KY1-1208</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification>Authorized signatory of Cayman Private Manager I Ltd., sole director of the Issuer.</relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Gordon</firstName>
                <lastName>Mattison</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>DMS House, 20 Genesis Close</street1>
                <street2>P.O. Box 31910</street2>
                <city>Grand Cayman</city>
                <stateOrCountry>E9</stateOrCountry>
                <stateOrCountryDescription>CAYMAN ISLANDS</stateOrCountryDescription>
                <zipCode>KY1-1208</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification>Authorized signatory of Cayman Private Manager I Ltd., sole director of the Issuer.</relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Ronan</firstName>
                <lastName>Gullfoyle</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>DMS House, 20 Genesis Close</street1>
                <street2>P.O. Box 31910</street2>
                <city>Grand Cayman</city>
                <stateOrCountry>E9</stateOrCountry>
                <stateOrCountryDescription>CAYMAN ISLANDS</stateOrCountryDescription>
                <zipCode>KY1-1208</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification>Authorized signatory of Cayman Private Manager I Ltd., sole director of the Issuer.</relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>William</firstName>
                <middleName>F.</middleName>
                <lastName>Souder</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>c/o RCP Advisors LLC</street1>
                <street2>100 Riverside Plaza, Suite 2400</street2>
                <city>Chicago</city>
                <stateOrCountry>IL</stateOrCountry>
                <stateOrCountryDescription>ILLINOIS</stateOrCountryDescription>
                <zipCode>60606-1519</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification>Member of Board of Managers of RCP-SOF, LLC, the General Partner of the Issuer.</relationshipClarification>
        </relatedPersonInfo>
    </relatedPersonsList>

    <offeringData>
        <industryGroup>
            <industryGroupType>Pooled Investment Fund</industryGroupType>
            <investmentFundInfo>
                <investmentFundType>Private Equity Fund</investmentFundType>
                <is40Act>false</is40Act>
            </investmentFundInfo>
        </industryGroup>
        <issuerSize>
            <revenueRange>Decline to Disclose</revenueRange>
        </issuerSize>
        <federalExemptionsExclusions>
            <item>06</item>
            <item>3C</item>
            <item>3C.7</item>
        </federalExemptionsExclusions>
        <typeOfFiling>
            <newOrAmendment>
                <isAmendment>true</isAmendment>
                <previousAccessionNumber>0001464909-09-000002</previousAccessionNumber>
            </newOrAmendment>
            <dateOfFirstSale>
                <value>2009-02-20</value>
            </dateOfFirstSale>
        </typeOfFiling>
        <durationOfOffering>
            <moreThanOneYear>true</moreThanOneYear>
        </durationOfOffering>
        <typesOfSecuritiesOffered>
            <isPooledInvestmentFundType>true</isPooledInvestmentFundType>
        </typesOfSecuritiesOffered>
        <businessCombinationTransaction>
            <isBusinessCombinationTransaction>false</isBusinessCombinationTransaction>
            <clarificationOfResponse></clarificationOfResponse>
        </businessCombinationTransaction>
        <minimumInvestmentAccepted>100000</minimumInvestmentAccepted>
        <salesCompensationList>
            <recipient>
                <recipientName>PTP Securities, LLC</recipientName>
                <recipientCRDNumber>136832</recipientCRDNumber>
                <associatedBDName>None</associatedBDName>
                <associatedBDCRDNumber>None</associatedBDCRDNumber>
                <recipientAddress>
                    <street1>540 Hopmeadow St.</street1>
                    <city>Simsbury</city>
                    <stateOrCountry>CT</stateOrCountry>
                    <stateOrCountryDescription>CONNECTICUT</stateOrCountryDescription>
                    <zipCode>06070</zipCode>
                </recipientAddress>
                <statesOfSolicitationList>
                    <state>AL</state>
                    <description>ALABAMA</description>
                    <state>AZ</state>
                    <description>ARIZONA</description>
                    <state>CA</state>
                    <description>CALIFORNIA</description>
                    <state>CO</state>
                    <description>COLORADO</description>
                    <state>CT</state>
                    <description>CONNECTICUT</description>
                    <state>DE</state>
                    <description>DELAWARE</description>
                    <state>DC</state>
                    <description>DISTRICT OF COLUMBIA</description>
                    <state>GA</state>
                    <description>GEORGIA</description>
                    <state>ID</state>
                    <description>IDAHO</description>
                    <state>IL</state>
                    <description>ILLINOIS</description>
                    <state>IN</state>
                    <description>INDIANA</description>
                    <state>KS</state>
                    <description>KANSAS</description>
                    <state>MD</state>
                    <description>MARYLAND</description>
                    <state>MA</state>
                    <description>MASSACHUSETTS</description>
                    <state>MI</state>
                    <description>MICHIGAN</description>
                    <state>MN</state>
                    <description>MINNESOTA</description>
                    <state>MS</state>
                    <description>MISSISSIPPI</description>
                    <state>MO</state>
                    <description>MISSOURI</description>
                    <state>MT</state>
                    <description>MONTANA</description>
                    <state>NE</state>
                    <description>NEBRASKA</description>
                    <state>NH</state>
                    <description>NEW HAMPSHIRE</description>
                    <state>NJ</state>
                    <description>NEW JERSEY</description>
                    <state>NM</state>
                    <description>NEW MEXICO</description>
                    <state>NY</state>
                    <description>NEW YORK</description>
                    <state>NC</state>
                    <description>NORTH CAROLINA</description>
                    <state>OH</state>
                    <description>OHIO</description>
                    <state>OR</state>
                    <description>OREGON</description>
                    <state>PA</state>
                    <description>PENNSYLVANIA</description>
                    <state>TX</state>
                    <description>TEXAS</description>
                    <state>VT</state>
                    <description>VERMONT</description>
                    <state>VA</state>
                    <description>VIRGINIA</description>
                    <state>WA</state>
                    <description>WASHINGTON</description>
                    <state>WI</state>
                    <description>WISCONSIN</description>
                </statesOfSolicitationList>
                <foreignSolicitation>false</foreignSolicitation>
            </recipient>
        </salesCompensationList>
        <offeringSalesAmounts>
            <totalOfferingAmount>300000000</totalOfferingAmount>
            <totalAmountSold>204860000</totalAmountSold>
            <totalRemaining>95140000</totalRemaining>
            <clarificationOfResponse></clarificationOfResponse>
        </offeringSalesAmounts>
        <investors>
            <hasNonAccreditedInvestors>false</hasNonAccreditedInvestors>
            <totalNumberAlreadyInvested>99</totalNumberAlreadyInvested>
        </investors>
        <salesCommissionsFindersFees>
            <salesCommissions>
                <dollarAmount>170000</dollarAmount>
                <isEstimate>true</isEstimate>
            </salesCommissions>
            <findersFees>
                <dollarAmount>0</dollarAmount>
            </findersFees>
            <clarificationOfResponse></clarificationOfResponse>
        </salesCommissionsFindersFees>
        <useOfProceeds>
            <grossProceedsUsed>
                <dollarAmount>21000000</dollarAmount>
                <isEstimate>true</isEstimate>
            </grossProceedsUsed>
            <clarificationOfResponse>Estimated management fees payable over the life of the fund based on total commitments of $300,000,000.</clarificationOfResponse>
        </useOfProceeds>
        <signatureBlock>
            <authorizedRepresentative>false</authorizedRepresentative>
            <signature>
                <issuerName>RCP Secondary Opportunity Fund LP</issuerName>
                <signatureName>William F. Souder</signatureName>
                <nameOfSigner>William F. Souder</nameOfSigner>
                <signatureTitle>Manager of RCP-SOF, LLC, the General Partner of the Issuer</signatureTitle>
                <signatureDate>2010-05-12</signatureDate>
            </signature>
            <signature>
                <issuerName>RCP SOF Feeder, Ltd.</issuerName>
                <signatureName>Roger H. Hanson</signatureName>
                <nameOfSigner>Roger H. Hanson</nameOfSigner>
                <signatureTitle>Director of the sole director, Cayman Private Manager I Ltd.</signatureTitle>
                <signatureDate>2010-05-12</signatureDate>
            </signature>
        </signatureBlock>
    </offeringData>
</edgarSubmission>
