-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
Originator-Key-Asymmetric:
 MFgwCgYEVQgBAQICAf8DSgAwRwJAW2sNKK9AVtBzYZmr6aGjlWyK3XmZv3dTINen
 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 RYstUhpbFHWCKynLgWSYZaMoETqR7iM06+WC05P5Y5Kb9hgn8yMl2nVZPimvSH/+
 VwJp8+SzMZ0Rcn8s5ZB72w==

<SEC-DOCUMENT>0001179110-06-019912.txt : 20061016
<SEC-HEADER>0001179110-06-019912.hdr.sgml : 20061016
<ACCEPTANCE-DATETIME>20061016180749
ACCESSION NUMBER:		0001179110-06-019912
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20061012
FILED AS OF DATE:		20061016
DATE AS OF CHANGE:		20061016

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:			0131

	BUSINESS ADDRESS:	
		STREET 1:		4440 ROSEWOOD DRIVE
		CITY:			PLEASANTON
		STATE:			CA
		ZIP:			94588-3050
		BUSINESS PHONE:		9259654400

	MAIL ADDRESS:	
		STREET 1:		4440 ROSEWOOD DRIVE
		CITY:			PLEASANTON
		STATE:			CA
		ZIP:			94588-3050

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			CRIBB GARY L
		CENTRAL INDEX KEY:			0001238929

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-14678
		FILM NUMBER:		061147217

	BUSINESS ADDRESS:	
		STREET 1:		ROSS STORES INC
		STREET 2:		8333 CENTRAL AVENUE
		CITY:			NEWARK
		STATE:			CA
		ZIP:			94560
		BUSINESS PHONE:		5105054400
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>edgar.xml
<DESCRIPTION>FORM 4 -
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2006-10-12</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

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

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001238929</rptOwnerCik>
            <rptOwnerName>CRIBB GARY L</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>4440 ROSEWOOD DRIVE, BUILDING 4</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>PLEASANTON</rptOwnerCity>
            <rptOwnerState>CA</rptOwnerState>
            <rptOwnerZipCode>94588</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>Executive VP, C.O.O.</officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2006-10-12</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>12924</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>29.9289</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>50669</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <derivativeTable></derivativeTable>

    <footnotes></footnotes>

    <ownerSignature>
        <signatureName>/s/ GARY L CRIBB EVP AND CHIEF OPERATIONS OFFICER</signatureName>
        <signatureDate>2006-10-16</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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