<SEC-DOCUMENT>0000916365-16-000170.txt : 20160504
<SEC-HEADER>0000916365-16-000170.hdr.sgml : 20160504
<ACCEPTANCE-DATETIME>20160504181601
ACCESSION NUMBER:		0000916365-16-000170
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20160502
FILED AS OF DATE:		20160504
DATE AS OF CHANGE:		20160504

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			TRACTOR SUPPLY CO /DE/
		CENTRAL INDEX KEY:			0000916365
		STANDARD INDUSTRIAL CLASSIFICATION:	RETAIL-BUILDING MATERIALS, HARDWARE, GARDEN SUPPLY [5200]
		IRS NUMBER:				133139732
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1227

	BUSINESS ADDRESS:	
		STREET 1:		5401 VIRGINIA WAY
		CITY:			BRENTWOOD
		STATE:			TN
		ZIP:			37027
		BUSINESS PHONE:		6154404600

	MAIL ADDRESS:	
		STREET 1:		5401 VIRGINIA WAY
		CITY:			BRENTWOOD
		STATE:			TN
		ZIP:			37027

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			ADAMS JOHN C JR
		CENTRAL INDEX KEY:			0001056193

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-23314
		FILM NUMBER:		161620953

	MAIL ADDRESS:	
		STREET 1:		4315 TUCKAHOE RD
		CITY:			MEMPHIS
		STATE:			TN
		ZIP:			38117
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>wf-form4_146240014793946.xml
<DESCRIPTION>FORM 4
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2016-05-02</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000916365</issuerCik>
        <issuerName>TRACTOR SUPPLY CO /DE/</issuerName>
        <issuerTradingSymbol>TSCO</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001056193</rptOwnerCik>
            <rptOwnerName>ADAMS JOHN C JR</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O TRACTOR SUPPLY COMPANY</rptOwnerStreet1>
            <rptOwnerStreet2>5401 VIRGINIA WAY</rptOwnerStreet2>
            <rptOwnerCity>BRENTWOOD</rptOwnerCity>
            <rptOwnerState>TN</rptOwnerState>
            <rptOwnerZipCode>37027</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>2016-05-02</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F1"/>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>1150</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                    <footnoteId id="F1"/>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>21183</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <derivativeTable></derivativeTable>

    <footnotes>
        <footnote id="F1">Shares were acquired pursuant to a grant of restricted stock units (RSUs) under the Tractor Supply Company 2009 Stock Incentive Plan. Each RSU entitles the reporting person to receive one share of common stock. The RSUs vest one year from the date of the grant.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>Johnston C. Adams by: /s/ Kurt D. Barton, as Attorney-in-fact</signatureName>
        <signatureDate>2016-05-04</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
