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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 TlbAR4NuD/SIkluXk1p7HJLe9B+x24BDxlOS3SYJfov5gU0Et/6pwjSfSR7joLXL
 RMeIirZhjQoSPPsN/pLDXw==

<SEC-DOCUMENT>0001180009-09-000004.txt : 20091216
<SEC-HEADER>0001180009-09-000004.hdr.sgml : 20091216
<ACCEPTANCE-DATETIME>20091216143557
ACCESSION NUMBER:		0001180009-09-000004
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20091215
FILED AS OF DATE:		20091216
DATE AS OF CHANGE:		20091216

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			AGL RESOURCES INC
		CENTRAL INDEX KEY:			0001004155
		STANDARD INDUSTRIAL CLASSIFICATION:	NATURAL GAS DISTRIBUTION [4924]
		IRS NUMBER:				582210952
		STATE OF INCORPORATION:			GA
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		TEN PEACHTREE PLACE
		CITY:			ATLANTA
		STATE:			GA
		ZIP:			30309
		BUSINESS PHONE:		4045844000

	MAIL ADDRESS:	
		STREET 1:		TEN PEACHTREE PLACE
		STREET 2:		DEPT. 1109
		CITY:			ATLANTA
		STATE:			GA
		ZIP:			30309

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			RIDDLE D RAYMOND
		CENTRAL INDEX KEY:			0001180009

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-14174
		FILM NUMBER:		091244170

	MAIL ADDRESS:	
		STREET 1:		TEN PEACHTREE PLACE
		STREET 2:		DEPT. 1466
		CITY:			ATLANTA
		STATE:			GA
		ZIP:			30309
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>edgar.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0303</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2009-12-15</periodOfReport>

    <issuer>
        <issuerCik>0001004155</issuerCik>
        <issuerName>AGL RESOURCES INC</issuerName>
        <issuerTradingSymbol>AGL</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001180009</rptOwnerCik>
            <rptOwnerName>RIDDLE D RAYMOND</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>TEN PEACHTREE PLACE</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>ATLANTA</rptOwnerCity>
            <rptOwnerState>GA</rptOwnerState>
            <rptOwnerZipCode>30309</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <derivativeTable>
        <derivativeTransaction>
            <securityTitle>
                <value>Common Stock Equivalents (CSEs)</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <footnoteId id="F1"/>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2009-12-15</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>948.231</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <footnoteId id="F2"/>
            </exerciseDate>
            <expirationDate>
                <footnoteId id="F2"/>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>948.231</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>38570.416</value>
                    <footnoteId id="F3"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value></value>
                </natureOfOwnership>
            </ownershipNature>
        </derivativeTransaction>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">The CSEs convert to common stock on a one-for-one basis.</footnote>
        <footnote id="F2">The CSEs are settled in cash upon the reporting person's termination of service.</footnote>
        <footnote id="F3">Includes 485.084 CSEs allocated to the reporting person's account on September 1, 2009 and 463.147 CSEs allocated to the reporting person's account on December 1, 2009 pursuant to a dividend reinvestment feature of the CSE Plan.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>Barbara P. Christopher, by power of attorney</signatureName>
        <signatureDate>2009-12-16</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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