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

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2017-03-15</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>2017-03-15</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>F</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>78078</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>16.66</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>780855</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. 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.</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>2017-03-17</signatureDate>
    </ownerSignature>
</ownershipDocument>
