-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
Originator-Key-Asymmetric:
 MFgwCgYEVQgBAQICAf8DSgAwRwJAW2sNKK9AVtBzYZmr6aGjlWyK3XmZv3dTINen
 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 KRO+E5Ch0SAVcsHhgZqf2cqr9XB6jkvoZxMUiwAiPA0GDDkauvC0pRx9DoJpakGA
 Tm6eqB9RLwgNP65x0x9NvQ==

<SEC-DOCUMENT>0001210405-03-000001.txt : 20030508
<SEC-HEADER>0001210405-03-000001.hdr.sgml : 20030508
<ACCEPTANCE-DATETIME>20030508123447
ACCESSION NUMBER:		0001210405-03-000001
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20030506
FILED AS OF DATE:		20030508

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			TRIGONY NICHOLAS D
		CENTRAL INDEX KEY:			0001210405

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-12187
		FILM NUMBER:		03687560

	BUSINESS ADDRESS:	
		STREET 1:		COX RADION INC
		STREET 2:		6205 PEACHTREE DUNWOODY ROAD
		CITY:			ATLANTA
		STATE:			GA
		ZIP:			30328
		BUSINESS PHONE:		6786450833

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			COX RADIO INC
		CENTRAL INDEX KEY:			0001018522
		STANDARD INDUSTRIAL CLASSIFICATION:	RADIO BROADCASTING STATIONS [4832]
		IRS NUMBER:				581620022
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		C/O COX ENTERPRISES INC
		STREET 2:		6205 PEACHTREE DUNWOODY ROAD
		CITY:			ATLANTA
		STATE:			GA
		ZIP:			30328
		BUSINESS PHONE:		678-645-0000

	MAIL ADDRESS:	
		STREET 1:		C/O COX ENTERPRISES INC
		STREET 2:		6205 PEACHTREE DUNWOODY ROAD
		CITY:			ATLANTA
		STATE:			GA
		ZIP:			30328
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>primary_doc.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>

<ownershipDocument>

    <documentType>4</documentType>

    <periodOfReport>2003-05-06</periodOfReport>


    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001018522</issuerCik>
        <issuerName>COX RADIO INC</issuerName>
        <issuerTradingSymbol>CXR</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001210405</rptOwnerCik>
            <rptOwnerName>TRIGONY NICHOLAS D</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>  </rptOwnerStreet1>
            <rptOwnerStreet2>  </rptOwnerStreet2>
            <rptOwnerCity>  </rptOwnerCity>
            <rptOwnerState>  </rptOwnerState>
            <rptOwnerZipCode>  </rptOwnerZipCode>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeSecurity>
        <securityTitle>
            <value>Class A Common Stock</value>
        </securityTitle>
        <transactionDate>
            <value>2003-05-06</value>
        </transactionDate>
        <transactionCoding>
            <transactionFormType>4</transactionFormType>
            <transactionCode>A</transactionCode>
            <equitySwapInvolved>0</equitySwapInvolved>
        </transactionCoding>
        <transactionTimeliness>
            <value></value>
        </transactionTimeliness>
        <transactionAmounts>
            <transactionShares>
                <value>758</value>
            </transactionShares>
            <transactionValue>
                <value>0</value>
            </transactionValue>
            <transactionAcquiredDisposedCode>
                <value>A</value>
            </transactionAcquiredDisposedCode>
        </transactionAmounts>
        <postTransactionAmounts>
            <sharesOwnedFollowingTransaction>
                <value>4462</value>
            </sharesOwnedFollowingTransaction>
        </postTransactionAmounts>
        <ownershipNature>
            <directOrIndirectOwnership>
                <value>D</value>
            </directOrIndirectOwnership>
        </ownershipNature>
    </nonDerivativeSecurity>


    <ownerSignature>
        <signatureName>Nicholas D. Trigony by Charles A. Bowen, Attorney-in-fact</signatureName>
        <signatureDate>2003-05-08</signatureDate>
    </ownerSignature>

</ownershipDocument>

</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
-----END PRIVACY-ENHANCED MESSAGE-----