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

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2015-09-03</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001581164</issuerCik>
        <issuerName>Extended Stay America, Inc.</issuerName>
        <issuerTradingSymbol>STAY</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001248032</rptOwnerCik>
            <rptOwnerName>LOPEZ GERARDO I</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O EXTENDED STAY AMERICA, INC.</rptOwnerStreet1>
            <rptOwnerStreet2>11525 N. COMMUNITY HOUSE ROAD, SUITE 100</rptOwnerStreet2>
            <rptOwnerCity>CHARLOTTE</rptOwnerCity>
            <rptOwnerState>NC</rptOwnerState>
            <rptOwnerZipCode>28277</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>See Remarks</officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Paired Shares</value>
                <footnoteId id="F1"/>
            </securityTitle>
            <transactionDate>
                <value>2015-09-03</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F2"/>
                <footnoteId id="F3"/>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>600000</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>600000</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <derivativeTable></derivativeTable>

    <footnotes>
        <footnote id="F1">Each Paired Share is comprised of one share of common stock, par value $0.01 per share, of Extended Stay America, Inc. and one share of Class B common stock, par value $0.01 per share, of ESH Hospitality, Inc., which shares are paired and traded as a single unit.</footnote>
        <footnote id="F2">The reported transaction is an award of Restricted Stock Units in respect of Paired Shares. A Form 4 reflecting the transaction in Paired Shares by the reporting person shown on this Form 4 has been concurrently filed with respect to ESH Hospitality, Inc. as issuer. Subject to the reporting person's continued employment with the issuer through the applicable vesting date, 100,000 of these Restricted Stock Units (the &quot;Time-Vesting RSUs&quot;) are scheduled to vest annually over a three-year period such that one-third of the Time-Vesting RSUs will vest on each of August 31, 2016, August 31, 2017 and August 31, 2018. (Continued in Footnote 3.)</footnote>
        <footnote id="F3">(Continued from Footnote 2.) Subject to the reporting person's continued employment with the issuer through August 31, 2018, 500,000 of these Restricted Stock Units are scheduled to vest based on achievement of a total shareholder return target for the period beginning on July 21, 2015 and ending on August 31, 2018. Vested Restricted Stock Units will generally be settled in Paired Shares on September 15th next following the applicable vesting date.</footnote>
    </footnotes>

    <remarks>Mr. Lopez is the President and Chief Executive Officer and a Director of Extended Stay America, Inc. and ESH Hospitality, Inc.</remarks>

    <ownerSignature>
        <signatureName>/s/ Christopher Dekle, Attorney-in-Fact for Gerardo I. Lopez</signatureName>
        <signatureDate>2015-09-03</signatureDate>
    </ownerSignature>
</ownershipDocument>
