-----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,
 IJ9ESDrov+68+psoJgLaiFoKQaEoA3Vq6fnXurTqIgiyAgejf7+JP+KDOEZ8q2zY
 Ud0TQd08PMv0RrDZlOziEA==

<SEC-DOCUMENT>0001179110-09-000666.txt : 20090106
<SEC-HEADER>0001179110-09-000666.hdr.sgml : 20090106
<ACCEPTANCE-DATETIME>20090106175700
ACCESSION NUMBER:		0001179110-09-000666
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20090102
FILED AS OF DATE:		20090106
DATE AS OF CHANGE:		20090106

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			LEE MARIE A
		CENTRAL INDEX KEY:			0001440958

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-34062
		FILM NUMBER:		09511287

	BUSINESS ADDRESS:	
		BUSINESS PHONE:		305-666-1861

	MAIL ADDRESS:	
		STREET 1:		C/O INTERVAL LEISURE GROUP, INC.
		STREET 2:		6262 SUNSET DRIVE
		CITY:			MIAMI
		STATE:			FL
		ZIP:			33143

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Interval Leisure Group, Inc.
		CENTRAL INDEX KEY:			0001434620
		STANDARD INDUSTRIAL CLASSIFICATION:	SERVICES-MEMBERSHIP ORGANIZATIONS [8600]
		IRS NUMBER:				000000000
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		6262 SUNSET DRIVE
		CITY:			MIAMI
		STATE:			FL
		ZIP:			33143
		BUSINESS PHONE:		(305) 666-1861

	MAIL ADDRESS:	
		STREET 1:		6262 SUNSET DRIVE
		CITY:			MIAMI
		STATE:			FL
		ZIP:			33143
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>edgar.xml
<DESCRIPTION>FORM 4 -
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0303</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2009-01-02</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001434620</issuerCik>
        <issuerName>Interval Leisure Group, Inc.</issuerName>
        <issuerTradingSymbol>IILG</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001440958</rptOwnerCik>
            <rptOwnerName>LEE MARIE A</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>6262 SUNSET DRIVE</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>MIAMI</rptOwnerCity>
            <rptOwnerState>FL</rptOwnerState>
            <rptOwnerZipCode>33143</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>Chief Information Officer</officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2009-01-02</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>F</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>57</value>
                    <footnoteId id="F1"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>5.39</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>1983</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <derivativeTable></derivativeTable>

    <footnotes>
        <footnote id="F1">Shares withheld to pay withholding taxes upon deferred receipt of shares that had previously vested at the closing of the spin-off on August 20, 2008.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/ Michele L. Keusch, attorney-in-fact</signatureName>
        <signatureDate>2009-01-06</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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