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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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MIC-Info: RSA-MD5,RSA,
 TQJtV38FFgVc2nlQQ6C9ThY9RHXb9UK5iWK37CE6hfS7SwEvgVCbswtR+uJwsjaP
 OEjXATTWp1TvvHggEAzhgg==

<SEC-DOCUMENT>0001225208-10-023658.txt : 20101029
<SEC-HEADER>0001225208-10-023658.hdr.sgml : 20101029
<ACCEPTANCE-DATETIME>20101029214524
ACCESSION NUMBER:		0001225208-10-023658
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20101028
FILED AS OF DATE:		20101029
DATE AS OF CHANGE:		20101029

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Thoman A. Randall
		CENTRAL INDEX KEY:			0001498492

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-07850
		FILM NUMBER:		101153312

	MAIL ADDRESS:	
		STREET 1:		5241 SPRING MOUNTAIN ROAD
		CITY:			LAS VEGAS
		STATE:			NV
		ZIP:			89150

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			SOUTHWEST GAS CORP
		CENTRAL INDEX KEY:			0000092416
		STANDARD INDUSTRIAL CLASSIFICATION:	NATURAL GAS TRANSMISSION & DISTRIBUTION [4923]
		IRS NUMBER:				880085720
		STATE OF INCORPORATION:			CA
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		5241 SPRING MOUNTAIN RD
		STREET 2:		PO BOX 98510
		CITY:			LAS VEGAS
		STATE:			NV
		ZIP:			89193-8510
		BUSINESS PHONE:		7028767237

	MAIL ADDRESS:	
		STREET 1:		5241 SPRING MOUNTAIN RD
		STREET 2:		PO BOX 98510
		CITY:			LAS VEGAS
		STATE:			NV
		ZIP:			89193
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>doc4.xml
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0303</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2010-10-28</periodOfReport>

    <issuer>
        <issuerCik>0000092416</issuerCik>
        <issuerName>SOUTHWEST GAS CORP</issuerName>
        <issuerTradingSymbol>SWX</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001498492</rptOwnerCik>
            <rptOwnerName>Thoman A. Randall</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>5241 SPRING MOUNTAIN</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>LAS VEGAS</rptOwnerCity>
            <rptOwnerState>NV</rptOwnerState>
            <rptOwnerZipCode>89150</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2010-10-28</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>P</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>7.2662</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>34.4058</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>1273.7576</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <derivativeTable></derivativeTable>

    <footnotes></footnotes>

    <ownerSignature>
        <signatureName>Karen W. Stanfield, POA</signatureName>
        <signatureDate>2010-10-29</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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