-----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,
 DXJ6T/o5wiW6iQvnNe7DR7YnTziS9k+gOzrM3nIe0xwD+wcqxKYP7aX4esfw7cMU
 4VtvbDd3wI3EqyPFKx3lTQ==

<SEC-DOCUMENT>0001180965-03-000002.txt : 20030710
<SEC-HEADER>0001180965-03-000002.hdr.sgml : 20030710
<ACCEPTANCE-DATETIME>20030710161447
ACCESSION NUMBER:		0001180965-03-000002
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20030710
FILED AS OF DATE:		20030710

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			DNP SELECT INCOME FUND INC
		CENTRAL INDEX KEY:			0000806628
		IRS NUMBER:				363480989
		STATE OF INCORPORATION:			MD
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		PO BOX 32760
		CITY:			LOUISVILLE
		STATE:			KY
		ZIP:			40232
		BUSINESS PHONE:		3123685510

	MAIL ADDRESS:	
		STREET 1:		PO BOX 32760
		CITY:			LOUISVILLE
		STATE:			KY
		ZIP:			40232

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	DUFF & PHELPS SELECTED UTILITIES INC
		DATE OF NAME CHANGE:	19910429

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			JEFFRIES FRANCIS E
		CENTRAL INDEX KEY:			0001141991

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	811-04915
		FILM NUMBER:		03782132

	BUSINESS ADDRESS:	
		STREET 1:		800 SCUDDERS HILL ROAD
		CITY:			PLAINSBORO
		STATE:			NJ
		ZIP:			08536
		BUSINESS PHONE:		6092822000

	MAIL ADDRESS:	
		STREET 1:		800 SCUDDERS HILL ROAD
		CITY:			PLAINSBORO
		STATE:			NJ
		ZIP:			08536
</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>2003-07-10</periodOfReport>


    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000806628</issuerCik>
        <issuerName>DNP SELECT INCOME FUND INC</issuerName>
        <issuerTradingSymbol>DNP</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001141991</rptOwnerCik>
            <rptOwnerName>JEFFRIES FRANCIS E</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>Common stock</value>
        </securityTitle>
        <transactionDate>
            <value>2003-07-10</value>
        </transactionDate>
        <transactionCoding>
            <transactionFormType>4</transactionFormType>
            <transactionCode>S</transactionCode>
            <equitySwapInvolved>0</equitySwapInvolved>
        </transactionCoding>
        <transactionTimeliness>
            <value></value>
        </transactionTimeliness>
        <transactionAmounts>
            <transactionShares>
                <value>4000</value>
            </transactionShares>
            <transactionValue>
                <value>11</value>
            </transactionValue>
            <transactionAcquiredDisposedCode>
                <value>D</value>
            </transactionAcquiredDisposedCode>
        </transactionAmounts>
        <postTransactionAmounts>
            <sharesOwnedFollowingTransaction>
                <value>33455</value>
            </sharesOwnedFollowingTransaction>
        </postTransactionAmounts>
        <ownershipNature>
            <directOrIndirectOwnership>
                <value>D</value>
            </directOrIndirectOwnership>
        </ownershipNature>
    </nonDerivativeSecurity>

    <nonDerivativeSecurity>
        <securityTitle>
            <value>Common stock</value>
        </securityTitle>
        <transactionDate>
            <value>2003-07-10</value>
        </transactionDate>
        <transactionCoding>
            <transactionFormType>4</transactionFormType>
            <transactionCode>S</transactionCode>
            <equitySwapInvolved>0</equitySwapInvolved>
        </transactionCoding>
        <transactionTimeliness>
            <value></value>
        </transactionTimeliness>
        <transactionAmounts>
            <transactionShares>
                <value>5000</value>
            </transactionShares>
            <transactionValue>
                <value>11.02</value>
            </transactionValue>
            <transactionAcquiredDisposedCode>
                <value>D</value>
            </transactionAcquiredDisposedCode>
        </transactionAmounts>
        <postTransactionAmounts>
            <sharesOwnedFollowingTransaction>
                <value>28455</value>
                <footnoteId id="F1"/>
            </sharesOwnedFollowingTransaction>
        </postTransactionAmounts>
        <ownershipNature>
            <directOrIndirectOwnership>
                <value>D</value>
            </directOrIndirectOwnership>
        </ownershipNature>
    </nonDerivativeSecurity>

    <footnotes>
        <footnote id="F1">The reporting person may be deemed to beneficially own an additional 8,033 shares of common stock indirectly through a family trust.  Pursuant to Rule 16a-1, the reporting person disclaims beneficial ownership of the shares of common stock held by the family trust.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>Nathan I. Partain, Attorney-in-Fact</signatureName>
        <signatureDate>2003-07-10</signatureDate>
    </ownerSignature>

</ownershipDocument>

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