<SEC-DOCUMENT>0000085961-19-000061.txt : 20190225
<SEC-HEADER>0000085961-19-000061.hdr.sgml : 20190225
<ACCEPTANCE-DATETIME>20190225163220
ACCESSION NUMBER:		0000085961-19-000061
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20190221
FILED AS OF DATE:		20190225
DATE AS OF CHANGE:		20190225

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Ravindran Rajeev
		CENTRAL INDEX KEY:			0001725974

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-04364
		FILM NUMBER:		19629964

	MAIL ADDRESS:	
		STREET 1:		11690 N.W. 105TH STREET
		CITY:			MIAMI
		STATE:			FL
		ZIP:			33178

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			RYDER SYSTEM INC
		CENTRAL INDEX KEY:			0000085961
		STANDARD INDUSTRIAL CLASSIFICATION:	SERVICES-AUTO RENTAL & LEASING (NO DRIVERS) [7510]
		IRS NUMBER:				590739250
		STATE OF INCORPORATION:			FL
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		11690 N.W. 105TH STREET
		CITY:			MIAMI
		STATE:			FL
		ZIP:			33178
		BUSINESS PHONE:		3055003726

	MAIL ADDRESS:	
		STREET 1:		11690 N.W. 105TH STREET
		CITY:			MIAMI
		STATE:			FL
		ZIP:			33178
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>wf-form4_155113032498275.xml
<DESCRIPTION>FORM 4
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2019-02-21</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000085961</issuerCik>
        <issuerName>RYDER SYSTEM INC</issuerName>
        <issuerTradingSymbol>R</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001725974</rptOwnerCik>
            <rptOwnerName>Ravindran Rajeev</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>11690 N.W. 105TH STREET</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>MIAMI</rptOwnerCity>
            <rptOwnerState>FL</rptOwnerState>
            <rptOwnerZipCode>33178</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>SVP &amp; CIO</officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>common stock</value>
            </securityTitle>
            <transactionDate>
                <value>2019-02-21</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>F</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F1"/>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>43</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>63.90</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>5188</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <derivativeTable></derivativeTable>

    <footnotes>
        <footnote id="F1">Represents shares of common stock withheld by the Company for the payment of taxes due upon the vesting of restricted stock rights granted to the reporting person on February 21, 2018.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/ Indira Sordo, power of attorney</signatureName>
        <signatureDate>2019-02-25</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
