<SUBMISSION>
<ACCESSION-NUMBER>0001180955-05-000109
<TYPE>4
<PUBLIC-DOCUMENT-COUNT>1
<PERIOD>20051220
<FILING-DATE>20051221
<DATE-OF-FILING-DATE-CHANGE>20051221
<ISSUER>
<COMPANY-DATA>
<CONFORMED-NAME>LAMAR ADVERTISING CO/NEW
<CIK>0001090425
<ASSIGNED-SIC>7311
<IRS-NUMBER>721449411
<STATE-OF-INCORPORATION>DE
<FISCAL-YEAR-END>1231
</COMPANY-DATA>
<BUSINESS-ADDRESS>
<STREET1>C/O LAMAR ADVERTISING COMPANY
<STREET2>5551 CORPORATE BOULEVARD
<CITY>BATON ROUGE
<STATE>LA
<ZIP>70808
<PHONE>2259261000
</BUSINESS-ADDRESS>
<MAIL-ADDRESS>
<STREET1>C/O LAMAR ADVERTISING COMPANY
<STREET2>5551 CORPORATE BOULEVARD
<CITY>BATON ROUGE
<STATE>LA
<ZIP>70808
</MAIL-ADDRESS>
<FORMER-COMPANY>
<FORMER-CONFORMED-NAME>LAMAR NEW HOLDING CO
<DATE-CHANGED>19990716
</FORMER-COMPANY>
</ISSUER>
<REPORTING-OWNER>
<OWNER-DATA>
<CONFORMED-NAME>REILLY ANNA
<CIK>0001214779
</OWNER-DATA>
<FILING-VALUES>
<FORM-TYPE>4
<ACT>34
<FILE-NUMBER>000-30242
<FILM-NUMBER>051279649
</FILING-VALUES>
<BUSINESS-ADDRESS>
<STREET1>5551 CORP BOULEVARD
<CITY>BATON ROUGE
<STATE>LA
<ZIP>70808
<PHONE>2259261000
</BUSINESS-ADDRESS>
<MAIL-ADDRESS>
<STREET1>C/O LAMAR CORP
<STREET2>5551 CORPORATE BLVD
<CITY>BATON ROUGE
<STATE>LA
<ZIP>70808
</MAIL-ADDRESS>
<FORMER-NAME>
<FORMER-CONFORMED-NAME>CULLINAN ANNA REILLY
<DATE-CHANGED>20030116
</FORMER-NAME>
</REPORTING-OWNER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>edgar.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2005-12-20</periodOfReport>

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

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001214779</rptOwnerCik>
            <rptOwnerName>REILLY ANNA</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O LAMAR ADVERTISING COMPANY</rptOwnerStreet1>
            <rptOwnerStreet2>5551 CORPORATE BOULEVARD</rptOwnerStreet2>
            <rptOwnerCity>BATON ROUGE</rptOwnerCity>
            <rptOwnerState>LA</rptOwnerState>
            <rptOwnerZipCode>70808</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>2005-12-20</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>J</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F1"/>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>548138</value>
                </transactionShares>
                <transactionPricePerShare>
                    <footnoteId id="F1"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>0</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>By RFLP</value>
                    <footnoteId id="F2"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Class A Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2005-12-20</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>J</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F1"/>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>45514</value>
                </transactionShares>
                <transactionPricePerShare>
                    <footnoteId id="F1"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>45514</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>2005-12-20</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>J</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F1"/>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>26515</value>
                </transactionShares>
                <transactionPricePerShare>
                    <footnoteId id="F1"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>26515</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>By GRAT</value>
                    <footnoteId id="F3"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Class A Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2005-12-20</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>J</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F1"/>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>53972</value>
                </transactionShares>
                <transactionPricePerShare>
                    <footnoteId id="F1"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>53972</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>By Trusts</value>
                    <footnoteId id="F4"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">Pro rata distribution from the Reilly Family Limited Partnership (the &quot;RFLP&quot;) to all of its limited partners.</footnote>
        <footnote id="F2">The Reporting Person is a General Partner of the RFLP.  The other General Partners of the RFLP are siblings of the Reporting Person.  Kevin P. Reilly, Jr., the President and Chief Executive Officer of Lamar Advertising Company (&quot;Lamar&quot;) and a sibling of the Reporting Person, is the Managing General Partner of the RFLP.  The Managing General Partner of the RFLP exercises sole voting power over the shares held by the RFLP, but disposition of the shares requires the approval of 50% of the general partnership interests in the RFLP.  The RFLP continues to hold 9,000,000 shares of Lamar's Class B Common Stock.  The Reporting Person disclaims beneficial ownership of the shares held by the RFLP except to the extent of her pecuniary interest therein.</footnote>
        <footnote id="F3">The Reporting Person's grantor retained annuity trust received these shares of Lamar's Class A Common Stock pursuant to the pro rata distribution from the RFLP.</footnote>
        <footnote id="F4">Two trusts for the benefit of the Reporting Person's immediate family received these shares of Lamar's Class A Common Stock pursuant to the pro rata distribution from the RFLP.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>James McIlwain, as attorney-in-fact</signatureName>
        <signatureDate>2005-12-21</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SUBMISSION>
