-----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,
 AIls9Qf1pjJsO2/UPfDPvC31ho824O7YyeMTWyWVijxjp+1Y4VOdyeH8bcXWLRpX
 rhsFB4tnTUidfmluL6H5xw==

<SEC-DOCUMENT>0000078460-03-000036.txt : 20031215
<SEC-HEADER>0000078460-03-000036.hdr.sgml : 20031215
<ACCEPTANCE-DATETIME>20031215141700
ACCESSION NUMBER:		0000078460-03-000036
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20030604
FILED AS OF DATE:		20031215

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			PIEDMONT NATURAL GAS CO INC
		CENTRAL INDEX KEY:			0000078460
		STANDARD INDUSTRIAL CLASSIFICATION:	NATURAL GAS DISTRIBUTION [4924]
		IRS NUMBER:				560556998
		STATE OF INCORPORATION:			NC
		FISCAL YEAR END:			1031

	BUSINESS ADDRESS:	
		STREET 1:		1915 REXFORD RD
		CITY:			CHARLOTTE
		STATE:			NC
		ZIP:			28211
		BUSINESS PHONE:		7043643120

	MAIL ADDRESS:	
		STREET 1:		P.O. BOX 33068
		CITY:			CHARLOTTE
		STATE:			NC
		ZIP:			28233

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			TRUSTY DAVID L
		CENTRAL INDEX KEY:			0001238191

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-06196
		FILM NUMBER:		031054052

	BUSINESS ADDRESS:	
		STREET 1:		C/O PIEDMONT NATURAL GAS CO
		STREET 2:		PO BOX 33068
		CITY:			CHARLOTTE
		STATE:			NC
		ZIP:			28233
		BUSINESS PHONE:		7047314202

	MAIL ADDRESS:	
		STREET 1:		C/O PIEDMONT NATURAL GAS CO
		STREET 2:		PO BOX 33068
		CITY:			CHARLOTTE
		STATE:			NC
		ZIP:			28233
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>primary_doc.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>

<ownershipDocument>

    <schemaVersion>X0201</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2003-06-04</periodOfReport>


    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000078460</issuerCik>
        <issuerName>PIEDMONT NATURAL GAS CO INC</issuerName>
        <issuerTradingSymbol>PNY</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001238191</rptOwnerCik>
            <rptOwnerName>TRUSTY DAVID L</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O PIEDMONT NATURAL GAS CO</rptOwnerStreet1>
            <rptOwnerStreet2>PO BOX 33068</rptOwnerStreet2>
            <rptOwnerCity>CHARLOTTE</rptOwnerCity>
            <rptOwnerState>NC</rptOwnerState>
            <rptOwnerZipCode>28233</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>Vice President</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>

        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2003-06-04</value>
            </transactionDate>
            <deemedExecutionDate>
                <value>2003-06-04</value>
            </deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>20</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>40.11</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>1155</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>

        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2003-12-12</value>
            </transactionDate>
            <deemedExecutionDate>
                <value>2003-12-12</value>
            </deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>J</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F1"/>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>831</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>41.91</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>1986</value>
                    <footnoteId id="F2"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>

    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">Award of Common Stock pursuant to Executive Long-Term Incentive Plan.</footnote>
        <footnote id="F2">Reporting Person indirectly owns 85.4557 shares by 401(k) as of November 25, 2003.</footnote>
    </footnotes>


    <ownerSignature>
        <signatureName>/s/Martin C. Ruegsegger by limited power of attorney for David L. Trusty</signatureName>
        <signatureDate>2003-12-15</signatureDate>
    </ownerSignature>

</ownershipDocument>

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