<SEC-DOCUMENT>0001320695-21-000133.txt : 20210513
<SEC-HEADER>0001320695-21-000133.hdr.sgml : 20210513
<ACCEPTANCE-DATETIME>20210513175026
ACCESSION NUMBER:		0001320695-21-000133
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20210512
FILED AS OF DATE:		20210513
DATE AS OF CHANGE:		20210513

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			ROBERTS LORI G
		CENTRAL INDEX KEY:			0001201830

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-32504
		FILM NUMBER:		21921083

	MAIL ADDRESS:	
		STREET 1:		1014 SUTTON PL
		CITY:			ST CHARLES
		STATE:			IL
		ZIP:			60174

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			TreeHouse Foods, Inc.
		CENTRAL INDEX KEY:			0001320695
		STANDARD INDUSTRIAL CLASSIFICATION:	CANNED, FROZEN & PRESERVED FRUIT, VEG & FOOD SPECIALTIES [2030]
		IRS NUMBER:				202311383
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		2021 SPRING ROAD
		STREET 2:		SUITE 600
		CITY:			OAK BROOK
		STATE:			IL
		ZIP:			60523
		BUSINESS PHONE:		7084831300

	MAIL ADDRESS:	
		STREET 1:		2021 SPRING ROAD
		STREET 2:		SUITE 600
		CITY:			OAK BROOK
		STATE:			IL
		ZIP:			60523
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>wf-form4_162094259471260.xml
<DESCRIPTION>FORM 4
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2021-05-12</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001320695</issuerCik>
        <issuerName>TreeHouse Foods, Inc.</issuerName>
        <issuerTradingSymbol>THS</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001201830</rptOwnerCik>
            <rptOwnerName>ROBERTS LORI G</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>2021 SPRING ROAD</rptOwnerStreet1>
            <rptOwnerStreet2>SUITE 600</rptOwnerStreet2>
            <rptOwnerCity>OAK BROOK</rptOwnerCity>
            <rptOwnerState>IL</rptOwnerState>
            <rptOwnerZipCode>60523</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>SVP of HR</officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2021-05-12</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>12120</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>50.744</value>
                    <footnoteId id="F1"/>
                </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">The price reported in Column 4 is an average price. These shares were sold in multiple transactions at prices ranging from $50.71 to $50.80, inclusive. The reporting person undertakes to provide to TreeHouse Foods, Inc., any security holder of TreeHouse Foods, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/ Thomas E. O'Neill, by Power of Attorney</signatureName>
        <signatureDate>2021-05-13</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
