-----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,
 U17eDxOa5YU918MX0I8yKxx6ndfUhI0gBb9XnF6tTqqDhbN19WVTk27MZO9kA/uX
 +p9BOi1v3kqGsEd4VZAllA==

<SEC-DOCUMENT>0001228379-05-000190.txt : 20050906
<SEC-HEADER>0001228379-05-000190.hdr.sgml : 20050905
<ACCEPTANCE-DATETIME>20050906173413
ACCESSION NUMBER:		0001228379-05-000190
CONFORMED SUBMISSION TYPE:	3
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20050901
FILED AS OF DATE:		20050906
DATE AS OF CHANGE:		20050906

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			SOUTHERN CALIFORNIA GAS CO
		CENTRAL INDEX KEY:			0000092108
		STANDARD INDUSTRIAL CLASSIFICATION:	NATURAL GAS TRANSMISSION [4922]
		IRS NUMBER:				951240705
		STATE OF INCORPORATION:			CA
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		555 W FIFTH ST
		STREET 2:		ML 14H1
		CITY:			LOS ANGELES
		STATE:			CA
		ZIP:			90013-1011
		BUSINESS PHONE:		2132441200

	MAIL ADDRESS:	
		STREET 1:		555 WEST 5TH STREET
		CITY:			LOS ANGELES
		STATE:			CA
		ZIP:			90051-1011

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Schlax Robert M
		CENTRAL INDEX KEY:			0001334930

	FILING VALUES:
		FORM TYPE:		3
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-01402
		FILM NUMBER:		051071216

	BUSINESS ADDRESS:	
		BUSINESS PHONE:		619-696-4644

	MAIL ADDRESS:	
		STREET 1:		101 ASH STREET HQ18
		CITY:			SAN DIEGO
		STATE:			CA
		ZIP:			92101
</SEC-HEADER>
<DOCUMENT>
<TYPE>3
<SEQUENCE>1
<FILENAME>edgar.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>3</documentType>

    <periodOfReport>2005-09-01</periodOfReport>

    <noSecuritiesOwned>0</noSecuritiesOwned>

    <issuer>
        <issuerCik>0000092108</issuerCik>
        <issuerName>SOUTHERN CALIFORNIA GAS CO</issuerName>
        <issuerTradingSymbol>SOCG</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001334930</rptOwnerCik>
            <rptOwnerName>Schlax Robert M</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>555 W. 5TH STREET</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>LOS ANGELES</rptOwnerCity>
            <rptOwnerState>CA</rptOwnerState>
            <rptOwnerZipCode>90013</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>VP, Controller &amp; CAO</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeHolding>
            <securityTitle>
                <value>No Securities Owned</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>0</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value></value>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <footnotes></footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>Robert M. Schlax</signatureName>
        <signatureDate>2005-08-31</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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