-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 H88MGm0435RB2nldFo8gkmVq2m5tGgoSwVlIdwpi8zCjHnqOOix4AxPd8jyyy8X8
 wAiP1YQ9gWiZtq/Wwuvyjw==

<SEC-DOCUMENT>0000771950-05-000024.txt : 20050523
<SEC-HEADER>0000771950-05-000024.hdr.sgml : 20050523
<ACCEPTANCE-DATETIME>20050523172552
ACCESSION NUMBER:		0000771950-05-000024
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20050519
FILED AS OF DATE:		20050523
DATE AS OF CHANGE:		20050523

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			WESTWOOD ONE INC /DE/
		CENTRAL INDEX KEY:			0000771950
		STANDARD INDUSTRIAL CLASSIFICATION:	SERVICES-AMUSEMENT & RECREATION SERVICES [7900]
		IRS NUMBER:				953980449
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		40 WEST 57TH STREET
		STREET 2:		5TH FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10019
		BUSINESS PHONE:		2126412063

	MAIL ADDRESS:	
		STREET 1:		40 WEST 57TH STREET
		STREET 2:		5TH FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10019

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	WESTWOOD ONE DELAWARE INC /CA/
		DATE OF NAME CHANGE:	19860408

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			HERDMAN ROBERT
		CENTRAL INDEX KEY:			0001263879

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-14691
		FILM NUMBER:		05852153

	BUSINESS ADDRESS:	
		BUSINESS PHONE:		212 641 2000

	MAIL ADDRESS:	
		STREET 1:		C/O WESTWOOD ONE INC
		STREET 2:		40 WEST 57TH STREET 15TH FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10019
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>primary_doc.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2005-05-19</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000771950</issuerCik>
        <issuerName>WESTWOOD ONE INC /DE/</issuerName>
        <issuerTradingSymbol>WON</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001263879</rptOwnerCik>
            <rptOwnerName>HERDMAN ROBERT</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O WESTWOOD ONE INC</rptOwnerStreet1>
            <rptOwnerStreet2>40 WEST 57TH STREET 15TH FLOOR</rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10019</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <derivativeTable>
        <derivativeTransaction>
            <securityTitle>
                <value>restricted stock unit</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <footnoteId id="F1"/>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2005-05-19</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>5018</value>
                </transactionShares>
                <transactionPricePerShare>
                    <footnoteId id="F1"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <footnoteId id="F1"/>
            </exerciseDate>
            <expirationDate>
                <footnoteId id="F1"/>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>common stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>5018</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>5018</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeTransaction>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">Annual grant of restricted stock units that vest in equal one-third increments on May 19, 2006, 2007 and 2008, the value of which is 100% deferred.  The restricted stock units convert on a &quot;1 for 1&quot; basis.  The deferred amount will be paid in shares of stock upon the cessation of the Director's service as a member of Westwood One's Board of Directors.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>David Hillman as attorney-in-fact for Robert Herdman</signatureName>
        <signatureDate>2005-05-23</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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