<SEC-DOCUMENT>0001140361-13-004652.txt : 20130205
<SEC-HEADER>0001140361-13-004652.hdr.sgml : 20130205
<ACCEPTANCE-DATETIME>20130205145557
ACCESSION NUMBER:		0001140361-13-004652
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20130204
FILED AS OF DATE:		20130205
DATE AS OF CHANGE:		20130205

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			ROMEO DOMINIC A
		CENTRAL INDEX KEY:			0001276009

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-09235
		FILM NUMBER:		13573557

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			THOR INDUSTRIES INC
		CENTRAL INDEX KEY:			0000730263
		STANDARD INDUSTRIAL CLASSIFICATION:	MOTOR HOMES [3716]
		IRS NUMBER:				930768752
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			0731

	BUSINESS ADDRESS:	
		STREET 1:		419 W PIKE ST
		CITY:			JACKSON CENTER
		STATE:			OH
		ZIP:			45334
		BUSINESS PHONE:		9375966849

	MAIL ADDRESS:	
		STREET 1:		419 W PIKE STREET
		CITY:			JACKSON CENTER
		STATE:			OH
		ZIP:			45334
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>doc1.xml
<DESCRIPTION>FORM 4
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2013-02-04</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000730263</issuerCik>
        <issuerName>THOR INDUSTRIES INC</issuerName>
        <issuerTradingSymbol>THO</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001276009</rptOwnerCik>
            <rptOwnerName>ROMEO DOMINIC A</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O THOR INDUSTRIES, INC.</rptOwnerStreet1>
            <rptOwnerStreet2>419 WEST PIKE STREET</rptOwnerStreet2>
            <rptOwnerCity>JACKSON CENTER,</rptOwnerCity>
            <rptOwnerState>OH</rptOwnerState>
            <rptOwnerZipCode>45334-0629</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>Sr. V.P. &amp; Chief Fin. Officer</officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
                <footnoteId id="F1"/>
            </securityTitle>
            <transactionDate>
                <value>2013-02-04</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>18844</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>18844</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <derivativeTable></derivativeTable>

    <footnotes>
        <footnote id="F1">This is a grant of restricted stock units pursuant to a previously disclosed award that may be settled solely by delivery of an equal number of shares of common stock.  The grant will vest in three equal installments on each of October 1, 2013, October 1, 2014 and October 1, 2015.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/ Dominic A. Romeo</signatureName>
        <signatureDate>2013-02-04</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
