-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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<SEC-DOCUMENT>0001471116-10-000001.txt : 20100823
<SEC-HEADER>0001471116-10-000001.hdr.sgml : 20100823
<ACCEPTANCE-DATETIME>20100823115823
ACCESSION NUMBER:		0001471116-10-000001
CONFORMED SUBMISSION TYPE:	D/A
PUBLIC DOCUMENT COUNT:		1
ITEM INFORMATION:		Rule 506
ITEM INFORMATION:		Investment Company Act Section 3(c)
ITEM INFORMATION:		Section 3(c)(7)
FILED AS OF DATE:		20100823
DATE AS OF CHANGE:		20100823
EFFECTIVENESS DATE:		20100823

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Credit Suisse QuEST US Market Neutral Fund, L.P.
		CENTRAL INDEX KEY:			0001471116
		IRS NUMBER:				270794936
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		D/A
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	021-134062
		FILM NUMBER:		101031821

	BUSINESS ADDRESS:	
		STREET 1:		11 MADISON AVENUE
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10010
		BUSINESS PHONE:		212-325-1447

	MAIL ADDRESS:	
		STREET 1:		11 MADISON AVENUE
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10010
</SEC-HEADER>
<DOCUMENT>
<TYPE>D/A
<SEQUENCE>1
<FILENAME>primary_doc.xml
<TEXT>
<XML>
<?xml version="1.0"?>
<edgarSubmission>

    <schemaVersion>X0704</schemaVersion>

    <submissionType>D/A</submissionType>

    <testOrLive>LIVE</testOrLive>

    <primaryIssuer>
        <cik>0001471116</cik>
        <entityName>Credit Suisse QuEST US Market Neutral Fund, L.P.</entityName>
        <issuerAddress>
            <street1>11 MADISON AVENUE</street1>
            <city>NEW YORK</city>
            <stateOrCountry>NY</stateOrCountry>
            <stateOrCountryDescription>NEW YORK</stateOrCountryDescription>
            <zipCode>10010</zipCode>
        </issuerAddress>
        <issuerPhoneNumber>212-325-8936</issuerPhoneNumber>
        <jurisdictionOfInc>DELAWARE</jurisdictionOfInc>
        <issuerPreviousNameList>
            <value>None</value>
        </issuerPreviousNameList>
        <edgarPreviousNameList>
            <value>None</value>
        </edgarPreviousNameList>
        <entityType>Limited Partnership</entityType>
        <yearOfInc>
            <withinFiveYears>true</withinFiveYears>
            <value>2009</value>
        </yearOfInc>
    </primaryIssuer>

    <relatedPersonsList>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Kenneth</firstName>
                <middleName>J.</middleName>
                <lastName>Lohsen</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>11 Madison Avenue</street1>
                <city>New York</city>
                <stateOrCountry>NY</stateOrCountry>
                <stateOrCountryDescription>NEW YORK</stateOrCountryDescription>
                <zipCode>10010</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
                <relationship>Promoter</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification>Vice President of Credit Suisse (Cayman) Management Limited, the Issuer's General Partner.</relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Ivy</firstName>
                <middleName>B.</middleName>
                <lastName>Dodes</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>11 Madison Avenue</street1>
                <city>New York</city>
                <stateOrCountry>NY</stateOrCountry>
                <stateOrCountryDescription>NEW YORK</stateOrCountryDescription>
                <zipCode>10010</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
                <relationship>Director</relationship>
                <relationship>Promoter</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification>Director and Vice President of Credit Suisse (Cayman) Management Limited, the Issuer's General Partner.</relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Edward</firstName>
                <middleName>S.</middleName>
                <lastName>Nadel</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>11 Madison Avenue</street1>
                <city>New York</city>
                <stateOrCountry>NY</stateOrCountry>
                <stateOrCountryDescription>NEW YORK</stateOrCountryDescription>
                <zipCode>10010</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
                <relationship>Promoter</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification>Vice President of Credit Suisse (Cayman) Management Limited, the Issuer's General Partner.</relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Ravi</firstName>
                <lastName>Singh</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>11 Madison Avenue</street1>
                <city>New York</city>
                <stateOrCountry>NY</stateOrCountry>
                <stateOrCountryDescription>NEW YORK</stateOrCountryDescription>
                <zipCode>10010</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
                <relationship>Director</relationship>
                <relationship>Promoter</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification>Director and Chairman of Credit Suisse (Cayman) Management Limited, the Issuer's General Partner.</relationshipClarification>
        </relatedPersonInfo>
    </relatedPersonsList>

    <offeringData>
        <industryGroup>
            <industryGroupType>Pooled Investment Fund</industryGroupType>
            <investmentFundInfo>
                <investmentFundType>Hedge Fund</investmentFundType>
                <is40Act>false</is40Act>
            </investmentFundInfo>
        </industryGroup>
        <issuerSize>
            <aggregateNetAssetValueRange>Decline to Disclose</aggregateNetAssetValueRange>
        </issuerSize>
        <federalExemptionsExclusions>
            <item>06</item>
            <item>3C</item>
            <item>3C.7</item>
        </federalExemptionsExclusions>
        <typeOfFiling>
            <newOrAmendment>
                <isAmendment>true</isAmendment>
                <previousAccessionNumber>0001471116-09-000001</previousAccessionNumber>
            </newOrAmendment>
            <dateOfFirstSale>
                <value>2009-09-01</value>
            </dateOfFirstSale>
        </typeOfFiling>
        <durationOfOffering>
            <moreThanOneYear>true</moreThanOneYear>
        </durationOfOffering>
        <typesOfSecuritiesOffered>
            <isPooledInvestmentFundType>true</isPooledInvestmentFundType>
        </typesOfSecuritiesOffered>
        <businessCombinationTransaction>
            <isBusinessCombinationTransaction>false</isBusinessCombinationTransaction>
            <clarificationOfResponse></clarificationOfResponse>
        </businessCombinationTransaction>
        <minimumInvestmentAccepted>250000</minimumInvestmentAccepted>
        <salesCompensationList>
            <recipient>
                <recipientName>none</recipientName>
                <recipientCRDNumber>None</recipientCRDNumber>
                <associatedBDName>Credit Suisse Securities (USA) LLC</associatedBDName>
                <associatedBDCRDNumber>816</associatedBDCRDNumber>
                <recipientAddress>
                    <street1>11 Madison Avenue</street1>
                    <city>New York</city>
                    <stateOrCountry>NY</stateOrCountry>
                    <stateOrCountryDescription>NEW YORK</stateOrCountryDescription>
                    <zipCode>10010</zipCode>
                </recipientAddress>
                <statesOfSolicitationList>
                    <value>All States</value>
                </statesOfSolicitationList>
                <foreignSolicitation>false</foreignSolicitation>
            </recipient>
        </salesCompensationList>
        <offeringSalesAmounts>
            <totalOfferingAmount>Indefinite</totalOfferingAmount>
            <totalAmountSold>50000000</totalAmountSold>
            <totalRemaining>Indefinite</totalRemaining>
            <clarificationOfResponse></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>0</dollarAmount>
            </grossProceedsUsed>
            <clarificationOfResponse>Customary advisory fees are paid to the Investment Manager by the master fund as provided for in the Issuer's offering materials.</clarificationOfResponse>
        </useOfProceeds>
        <signatureBlock>
            <authorizedRepresentative>false</authorizedRepresentative>
            <signature>
                <issuerName>Credit Suisse QuEST US Market Neutral Fund, L.P.</issuerName>
                <signatureName>Kenneth J. Lohsen</signatureName>
                <nameOfSigner>Kenneth J. Lohsen</nameOfSigner>
                <signatureTitle>Vice President of the Issuer's General Partner</signatureTitle>
                <signatureDate>2010-08-23</signatureDate>
            </signature>
        </signatureBlock>
    </offeringData>
</edgarSubmission>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
-----END PRIVACY-ENHANCED MESSAGE-----