<SEC-DOCUMENT>0001179110-19-004177.txt : 20190322
<SEC-HEADER>0001179110-19-004177.hdr.sgml : 20190322
<ACCEPTANCE-DATETIME>20190322154551
ACCESSION NUMBER:		0001179110-19-004177
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20190320
FILED AS OF DATE:		20190322
DATE AS OF CHANGE:		20190322

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Hartshorn Michael J.
		CENTRAL INDEX KEY:			0001598716

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-14678
		FILM NUMBER:		19699722

	MAIL ADDRESS:	
		STREET 1:		5130 HACIENDA DRIVE
		CITY:			DUBLIN
		STATE:			CA
		ZIP:			94568

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			ROSS STORES INC
		CENTRAL INDEX KEY:			0000745732
		STANDARD INDUSTRIAL CLASSIFICATION:	RETAIL-FAMILY CLOTHING STORES [5651]
		IRS NUMBER:				941390387
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			0202

	BUSINESS ADDRESS:	
		STREET 1:		5130 HACIENDA DRIVE
		CITY:			DUBLIN
		STATE:			CA
		ZIP:			94568
		BUSINESS PHONE:		9259654400

	MAIL ADDRESS:	
		STREET 1:		5130 HACIENDA DRIVE
		CITY:			DUBLIN
		STATE:			CA
		ZIP:			94568
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>edgar.xml
<DESCRIPTION>FORM 4 -
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2019-03-20</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000745732</issuerCik>
        <issuerName>ROSS STORES INC</issuerName>
        <issuerTradingSymbol>ROST</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001598716</rptOwnerCik>
            <rptOwnerName>Hartshorn Michael J.</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>5130 HACIENDA DRIVE</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>DUBLIN</rptOwnerCity>
            <rptOwnerState>CA</rptOwnerState>
            <rptOwnerZipCode>94568</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>GEVP, Finance &amp; Legal, and CFO</officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2019-03-20</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>9924</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>91.4805</value>
                    <footnoteId id="F1"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>82636</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <derivativeTable></derivativeTable>

    <footnotes>
        <footnote id="F1">The price reported is a weighted average price.  The shares were sold in multiple transactions at prices ranging from $91.48 to $91.4845, inclusive.  The reporting person undertakes to provide to Ross Stores, Inc., any security holder of Ross Stores, Inc., and to the staff of the Securities and Exchange Commission upon request, full information regarding the numbers of shares sold at each separate price within this price range.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/ Michael Hartshorn</signatureName>
        <signatureDate>2019-03-22</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
