-----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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<SEC-DOCUMENT>0000908662-11-000068.txt : 20110223
<SEC-HEADER>0000908662-11-000068.hdr.sgml : 20110223
<ACCEPTANCE-DATETIME>20110223162338
ACCESSION NUMBER:		0000908662-11-000068
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20110221
FILED AS OF DATE:		20110223
DATE AS OF CHANGE:		20110223

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			LAMAR ADVERTISING CO/NEW
		CENTRAL INDEX KEY:			0001090425
		STANDARD INDUSTRIAL CLASSIFICATION:	SERVICES-ADVERTISING AGENCIES [7311]
		IRS NUMBER:				721449411
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		C/O LAMAR ADVERTISING COMPANY
		STREET 2:		5321 CORPORATE BOULEVARD
		CITY:			BATON ROUGE
		STATE:			LA
		ZIP:			70808
		BUSINESS PHONE:		2259261000

	MAIL ADDRESS:	
		STREET 1:		C/O LAMAR ADVERTISING COMPANY
		STREET 2:		5321 CORPORATE BOULEVARD
		CITY:			BATON ROUGE
		STATE:			LA
		ZIP:			70808

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	LAMAR NEW HOLDING CO
		DATE OF NAME CHANGE:	19990716

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			ISTRE KEITH A
		CENTRAL INDEX KEY:			0001214777

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-30242
		FILM NUMBER:		11632502

	MAIL ADDRESS:	
		STREET 1:		C/O LAMAR CORP
		STREET 2:		5551 CORPORATE BLVD
		CITY:			BATON ROUGE
		STATE:			LA
		ZIP:			70808
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>edgar.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0303</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2011-02-21</periodOfReport>

    <issuer>
        <issuerCik>0001090425</issuerCik>
        <issuerName>LAMAR ADVERTISING CO/NEW</issuerName>
        <issuerTradingSymbol>LAMR</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001214777</rptOwnerCik>
            <rptOwnerName>ISTRE KEITH A</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O LAMAR ADVERTISING COMPANY</rptOwnerStreet1>
            <rptOwnerStreet2>5321 CORPORATE BOULEVARD</rptOwnerStreet2>
            <rptOwnerCity>BATON ROUGE</rptOwnerCity>
            <rptOwnerState>LA</rptOwnerState>
            <rptOwnerZipCode>70808</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>Chief Financial Officer</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Class A Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2011-02-21</value>
                <footnoteId id="F1"/>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>26000</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                    <footnoteId id="F1"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>74750</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value></value>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Class A Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2011-02-21</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>F</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>9091</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>41.54</value>
                    <footnoteId id="F2"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>65659</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value></value>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">These shares were certified by the Compensation Committee as earned pursuant to the previously announced performance-based equity bonus program for fiscal year 2010 under the Lamar 1996 Equity Incentive Plan, as amended.</footnote>
        <footnote id="F2">Closing price as of February 18, 2011, the trading day preceding the certification date since the certification date was not a trading day.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/ James McIlwain, as attorney-in-fact</signatureName>
        <signatureDate>2011-02-23</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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