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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
Originator-Key-Asymmetric:
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 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 CjK3THrP9A79ditRdEzEx0KkNhvNeiLBxG4ReafhWviWqRMtykKtzauI7F4NN4W8
 AF9sHNv0qQsJENfYjfMqtw==

<SEC-DOCUMENT>0001140361-10-040442.txt : 20101007
<SEC-HEADER>0001140361-10-040442.hdr.sgml : 20101007
<ACCEPTANCE-DATETIME>20101007153903
ACCESSION NUMBER:		0001140361-10-040442
CONFORMED SUBMISSION TYPE:	3
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20101006
FILED AS OF DATE:		20101007
DATE AS OF CHANGE:		20101007

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Walker Dale A
		CENTRAL INDEX KEY:			0001501143

	FILING VALUES:
		FORM TYPE:		3
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-34893
		FILM NUMBER:		101113964

	MAIL ADDRESS:	
		STREET 1:		C/O STANDARD BANK
		STREET 2:		2640 MONROEVILLE BOULEVARD
		CITY:			MONROEVILLE
		STATE:			PA
		ZIP:			15146

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Standard Financial Corp.
		CENTRAL INDEX KEY:			0001492915
		STANDARD INDUSTRIAL CLASSIFICATION:	STATE COMMERCIAL BANKS [6022]
		IRS NUMBER:				000000000
		STATE OF INCORPORATION:			MD
		FISCAL YEAR END:			0930

	BUSINESS ADDRESS:	
		STREET 1:		2640 MONROEVILLE BOULEVARD
		CITY:			MONROEVILLE
		STATE:			PA
		ZIP:			15146
		BUSINESS PHONE:		412-856-0363

	MAIL ADDRESS:	
		STREET 1:		2640 MONROEVILLE BOULEVARD
		CITY:			MONROEVILLE
		STATE:			PA
		ZIP:			15146

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	Standard Financial, Corp.
		DATE OF NAME CHANGE:	20100528

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	Standard Financial, Inc.
		DATE OF NAME CHANGE:	20100527
</SEC-HEADER>
<DOCUMENT>
<TYPE>3
<SEQUENCE>1
<FILENAME>doc1.xml
<DESCRIPTION>FORM 3
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0203</schemaVersion>

    <documentType>3</documentType>

    <periodOfReport>2010-10-06</periodOfReport>

    <noSecuritiesOwned>0</noSecuritiesOwned>

    <issuer>
        <issuerCik>0001492915</issuerCik>
        <issuerName>Standard Financial Corp.</issuerName>
        <issuerTradingSymbol>STND</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001501143</rptOwnerCik>
            <rptOwnerName>Walker Dale A</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>2640 MONROEVILLE BOULEVARD</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>MONROEVILLE</rptOwnerCity>
            <rptOwnerState>PA</rptOwnerState>
            <rptOwnerZipCode>15146</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>1</isOther>
            <officerTitle></officerTitle>
            <otherText>Vice Chairman of the Board</otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>6100</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>1916</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>By IRA</value>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>2023</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>By Spouse's IRA</value>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <derivativeTable></derivativeTable>

    <footnotes></footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/ Marc P. Levy, Pursuant to Power of Attorney</signatureName>
        <signatureDate>2010-10-07</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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