<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2017-02-10</periodOfReport>

    <notSubjectToSection16>1</notSubjectToSection16>

    <issuer>
        <issuerCik>0001574532</issuerCik>
        <issuerName>WCI Communities, Inc.</issuerName>
        <issuerTradingSymbol>WCIC</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001645971</rptOwnerCik>
            <rptOwnerName>RAPAPORT JONATHAN</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O WCI COMMUNITIES, INC.</rptOwnerStreet1>
            <rptOwnerStreet2>23401 WALDEN CENTER DRIVE</rptOwnerStreet2>
            <rptOwnerCity>BONITA SPRINGS</rptOwnerCity>
            <rptOwnerState>FL</rptOwnerState>
            <rptOwnerZipCode>34134</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>See Remarks</officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2017-02-10</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>D</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>25500</value>
                    <footnoteId id="F1"/>
                    <footnoteId id="F2"/>
                </transactionShares>
                <transactionPricePerShare>
                    <footnoteId id="F2"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>0</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <derivativeTable></derivativeTable>

    <footnotes>
        <footnote id="F1">Pursuant to that Agreement and Plan of Merger dated as of September 22, 2016 among the Issuer (hereinafter, &quot;WCI&quot;), Lennar Corporation, a Delaware corporation (&quot;Lennar&quot;), and certain subsidiaries of Lennar, the parties thereto effected the merger of Marlin Green Corp., a Delaware corporation and wholly-owned subsidiary of Lennar, with and into WCI (the &quot;Merger&quot;) with WCI surviving the Merger as a direct, wholly-owned subsidiary of Lennar.</footnote>
        <footnote id="F2">Comprised of 25,500 shares of restricted common stock of WCI (the &quot;Restricted Shares&quot;).  At the effective time of the Merger (the &quot;Effective Time&quot;), each Restricted Share outstanding and unvested or otherwise subject to possible forfeiture vested immediately prior to the completion of the Merger and was cancelled for the right to receive $23.50 in cash.</footnote>
    </footnotes>

    <remarks>The Reporting Person is Senior Vice President, Homebuilding and Development/President-East Region of the Issuer.</remarks>

    <ownerSignature>
        <signatureName>/s/ Vivien N. Hastings, Attorney-in Fact for Jonathan F. Rapaport</signatureName>
        <signatureDate>2017-02-10</signatureDate>
    </ownerSignature>
</ownershipDocument>
