-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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MIC-Info: RSA-MD5,RSA,
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 TdOSucQ6VvsyZs6wa6lHmw==

<SEC-DOCUMENT>0000230498-08-000120.txt : 20081030
<SEC-HEADER>0000230498-08-000120.hdr.sgml : 20081030
<ACCEPTANCE-DATETIME>20081030164928
ACCESSION NUMBER:		0000230498-08-000120
CONFORMED SUBMISSION TYPE:	5
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20080930
FILED AS OF DATE:		20081030
DATE AS OF CHANGE:		20081030

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Rock-Tenn CO
		CENTRAL INDEX KEY:			0000230498
		STANDARD INDUSTRIAL CLASSIFICATION:	PAPERBOARD CONTAINERS & BOXES [2650]
		IRS NUMBER:				620342590
		STATE OF INCORPORATION:			GA
		FISCAL YEAR END:			0930

	BUSINESS ADDRESS:	
		STREET 1:		504 THRASHER STREET
		CITY:			NORCROSS
		STATE:			GA
		ZIP:			30071
		BUSINESS PHONE:		(770) 448-2193

	MAIL ADDRESS:	
		STREET 1:		PO BOX 4098
		CITY:			NORCROSS
		STATE:			GA
		ZIP:			30091

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	ROCK TENN CO
		DATE OF NAME CHANGE:	19931223

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			HOPKINS JOHN D
		CENTRAL INDEX KEY:			0001196853

	FILING VALUES:
		FORM TYPE:		5
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-12613
		FILM NUMBER:		081151587

	BUSINESS ADDRESS:	
		STREET 1:		100 NORTH GREEN
		CITY:			GREENSBORO
		STATE:			NC
		ZIP:			27401
		BUSINESS PHONE:		(404) 872-7000

	MAIL ADDRESS:	
		STREET 1:		ONE ATLANTIC CENTER SUITE 3500
		STREET 2:		1201 WEST PEACHTREE STREET
		CITY:			ATLANTA
		STATE:			GA
		ZIP:			30309
</SEC-HEADER>
<DOCUMENT>
<TYPE>5
<SEQUENCE>1
<FILENAME>edgar.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0303</schemaVersion>

    <documentType>5</documentType>

    <periodOfReport>2008-09-30</periodOfReport>

    <form3HoldingsReported>0</form3HoldingsReported>

    <form4TransactionsReported>1</form4TransactionsReported>

    <issuer>
        <issuerCik>0000230498</issuerCik>
        <issuerName>Rock-Tenn CO</issuerName>
        <issuerTradingSymbol>RKT</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001196853</rptOwnerCik>
            <rptOwnerName>HOPKINS JOHN D</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>504 THRASHER STREET</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>NORCROSS</rptOwnerCity>
            <rptOwnerState>GA</rptOwnerState>
            <rptOwnerZipCode>30071</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Class A Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2008-09-30</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value>L</value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>10000</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>42.0189</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>48864</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value></value>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Class A Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>3000</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>By Trust</value>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Class A Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>100</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>By Spouse</value>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <footnotes></footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>Robert B. McIntosh (attorney-in-fact pursuant to power of attorney previously filed with SEC)</signatureName>
        <signatureDate>2008-10-30</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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