<?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>0001184810</rptOwnerCik>
            <rptOwnerName>NEVIN DARIUS G</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O WCI COMMUNITIES, INC.</rptOwnerStreet1>
            <rptOwnerStreet2>24301 WALDEN CENTER DRIVE</rptOwnerStreet2>
            <rptOwnerCity>BONITA SPRINGS</rptOwnerCity>
            <rptOwnerState>FL</rptOwnerState>
            <rptOwnerZipCode>34134</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle></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>10470</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 5,164 shares of common stock of WCI (the &quot;Unrestricted Shares&quot;) and 5,306 shares of restricted common stock of WCI (the &quot;Restricted Shares&quot;).  At the effective time of the Merger (the &quot;Effective Time&quot;), (i) each Unrestricted Share was disposed of in exchange for $23.50 in cash and (ii) 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>

    <ownerSignature>
        <signatureName>/s/ Vivien N. Hastings, Attorney-in Fact for Darius G. Nevin</signatureName>
        <signatureDate>2017-02-10</signatureDate>
    </ownerSignature>
</ownershipDocument>
