-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
Originator-Key-Asymmetric:
 MFgwCgYEVQgBAQICAf8DSgAwRwJAW2sNKK9AVtBzYZmr6aGjlWyK3XmZv3dTINen
 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 Tywwzd+XvIdGk/3msdYMJ6ND5KprZVeOLfF95xxUqoCO8ySkFTdwYTwvIhTQOmdo
 F6YXEZAAmUbc5Ir2Lq5jzw==

<SEC-DOCUMENT>0001405408-10-000001.txt : 20100224
<SEC-HEADER>0001405408-10-000001.hdr.sgml : 20100224
<ACCEPTANCE-DATETIME>20100224171715
ACCESSION NUMBER:		0001405408-10-000001
CONFORMED SUBMISSION TYPE:	D
PUBLIC DOCUMENT COUNT:		1
ITEM INFORMATION:		Rule 506
FILED AS OF DATE:		20100224
DATE AS OF CHANGE:		20100224
EFFECTIVENESS DATE:		20100224

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			SISF ONSHORE FUND
		CENTRAL INDEX KEY:			0001405408
		IRS NUMBER:				980444330
		STATE OF INCORPORATION:			E9
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		D
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	021-105433
		FILM NUMBER:		10630610

	BUSINESS ADDRESS:	
		STREET 1:		3600 SOUTH LAKE DRIVE
		CITY:			ST. FRANCIS
		STATE:			WI
		ZIP:			53235-3716
		BUSINESS PHONE:		414-294-7000

	MAIL ADDRESS:	
		STREET 1:		3600 SOUTH LAKE DRIVE
		CITY:			ST. FRANCIS
		STATE:			WI
		ZIP:			53235-3716
</SEC-HEADER>
<DOCUMENT>
<TYPE>D
<SEQUENCE>1
<FILENAME>primary_doc.xml
<TEXT>
<XML>
<?xml version="1.0"?>
<edgarSubmission>

    <schemaVersion>X0603</schemaVersion>

    <submissionType>D</submissionType>

    <testOrLive>LIVE</testOrLive>

    <primaryIssuer>
        <cik>0001405408</cik>
        <entityName>SISF ONSHORE FUND</entityName>
        <issuerAddress>
            <street1>3600 SOUTH LAKE DRIVE</street1>
            <city>ST. FRANCIS</city>
            <stateOrCountry>WI</stateOrCountry>
            <zipCode>53235-3716</zipCode>
        </issuerAddress>
        <issuerPhoneNumber>414-294-7000</issuerPhoneNumber>
        <jurisdictionOfInc>CAYMAN ISLANDS</jurisdictionOfInc>
        <issuerPreviousNameList>
            <previousName>Stark Investments Structured Finance Onshore Fund</previousName>
        </issuerPreviousNameList>
        <edgarPreviousNameList>
            <value>None</value>
        </edgarPreviousNameList>
        <entityType>Business Trust</entityType>
        <yearOfInc>
            <overFiveYears>true</overFiveYears>
        </yearOfInc>
    </primaryIssuer>

    <relatedPersonsList>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Brian</firstName>
                <middleName>J</middleName>
                <lastName>Stark</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>3600 South Lake Drive</street1>
                <city>St Francis</city>
                <stateOrCountry>WI</stateOrCountry>
                <zipCode>53235</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Michael</firstName>
                <middleName>A</middleName>
                <lastName>Roth</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>3600 South Lake Drive</street1>
                <city>St Francis</city>
                <stateOrCountry>WI</stateOrCountry>
                <zipCode>53235</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></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>
        </federalExemptionsExclusions>
        <typeOfFiling>
            <newOrAmendment>
                <isAmendment>false</isAmendment>
            </newOrAmendment>
            <dateOfFirstSale>
                <value>2005-01-01</value>
            </dateOfFirstSale>
        </typeOfFiling>
        <durationOfOffering>
            <moreThanOneYear>true</moreThanOneYear>
        </durationOfOffering>
        <typesOfSecuritiesOffered>
            <isPooledInvestmentFundType>true</isPooledInvestmentFundType>
        </typesOfSecuritiesOffered>
        <businessCombinationTransaction>
            <isBusinessCombinationTransaction>false</isBusinessCombinationTransaction>
            <clarificationOfResponse></clarificationOfResponse>
        </businessCombinationTransaction>
        <minimumInvestmentAccepted>1000000</minimumInvestmentAccepted>
        <salesCompensationList></salesCompensationList>
        <offeringSalesAmounts>
            <totalOfferingAmount>Indefinite</totalOfferingAmount>
            <totalAmountSold>97652000</totalAmountSold>
            <totalRemaining>Indefinite</totalRemaining>
            <clarificationOfResponse></clarificationOfResponse>
        </offeringSalesAmounts>
        <investors>
            <hasNonAccreditedInvestors>false</hasNonAccreditedInvestors>
            <totalNumberAlreadyInvested>24</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>SISF ONSHORE FUND</issuerName>
                <signatureName>Michael A. Roth</signatureName>
                <nameOfSigner>Michael A. Roth</nameOfSigner>
                <signatureTitle>Managing Member, SR Financial LLC, Investment Manager issuer</signatureTitle>
                <signatureDate>2010-02-24</signatureDate>
            </signature>
        </signatureBlock>
    </offeringData>
</edgarSubmission>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
-----END PRIVACY-ENHANCED MESSAGE-----