<SEC-DOCUMENT>0001191739-19-000002.txt : 20190228
<SEC-HEADER>0001191739-19-000002.hdr.sgml : 20190228
<ACCEPTANCE-DATETIME>20190228175539
ACCESSION NUMBER:		0001191739-19-000002
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20190226
FILED AS OF DATE:		20190228
DATE AS OF CHANGE:		20190228

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			GASSER MICHAEL J
		CENTRAL INDEX KEY:			0001191739

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-00566
		FILM NUMBER:		19645429

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			GREIF INC
		CENTRAL INDEX KEY:			0000043920
		STANDARD INDUSTRIAL CLASSIFICATION:	METAL SHIPPING BARRELS, DRUMS, KEGS & PAILS [3412]
		IRS NUMBER:				314388903
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1031

	BUSINESS ADDRESS:	
		STREET 1:		425 WINTER ROAD
		CITY:			DELAWARE
		STATE:			OH
		ZIP:			43015
		BUSINESS PHONE:		7405496000

	MAIL ADDRESS:	
		STREET 1:		425 WINTER ROAD
		CITY:			DELAWARE
		STATE:			OH
		ZIP:			43015

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	GREIF BROTHERS CORP
		DATE OF NAME CHANGE:	19920703

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	GREIF BROTHERS COOPERAGE CORP
		DATE OF NAME CHANGE:	19690820
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>wf-form4_155139452510062.xml
<DESCRIPTION>FORM 4
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2019-02-26</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000043920</issuerCik>
        <issuerName>GREIF INC</issuerName>
        <issuerTradingSymbol>GEF,GEF.B</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001191739</rptOwnerCik>
            <rptOwnerName>GASSER MICHAEL J</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>425 WINTER ROAD</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>DELAWARE</rptOwnerCity>
            <rptOwnerState>OH</rptOwnerState>
            <rptOwnerZipCode>43015</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>Class A Common Shares</value>
            </securityTitle>
            <transactionDate>
                <value>2019-02-26</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>3143</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                    <footnoteId id="F1"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>176450</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Class B Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>23796</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <derivativeTable></derivativeTable>

    <footnotes>
        <footnote id="F1">Transaction reflects a restricted stock award made to the Reporting Person pursuant to the terms of the Issuer's outside directors' equity award plan.  The shares are subject to restriction until the earlier of February 26, 2022, or the Reporting Person's termination from the board due to the Reporting Person's retirement, death or other reason.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>Michael J. Gasser by Gary R. Martz pursuant to a POA attached hereto.</signatureName>
        <signatureDate>2019-02-28</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
