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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,
 Uo8aJpxaR0bTZ/iZampeqjPYHWiwo86doImMcK13WgnqKVSqJOILjTb9m4m2iXbM
 MvaAFK3S+8/mmSb2GTL/5Q==

<SEC-DOCUMENT>0001181431-07-059382.txt : 20071001
<SEC-HEADER>0001181431-07-059382.hdr.sgml : 20071001
<ACCEPTANCE-DATETIME>20071001105709
ACCESSION NUMBER:		0001181431-07-059382
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20070928
FILED AS OF DATE:		20071001
DATE AS OF CHANGE:		20071001

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			NICOR INC
		CENTRAL INDEX KEY:			0000072020
		STANDARD INDUSTRIAL CLASSIFICATION:	NATURAL GAS DISTRIBUTION [4924]
		IRS NUMBER:				362855175
		STATE OF INCORPORATION:			IL
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		1844 FERRY RD
		CITY:			NAPERVILLE
		STATE:			IL
		ZIP:			60563
		BUSINESS PHONE:		6303059500

	MAIL ADDRESS:	
		STREET 1:		PO BOX 3014
		CITY:			NAPERVILLE
		STATE:			IL
		ZIP:			60566-7014

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			RIORDAN JOHN F
		CENTRAL INDEX KEY:			0001192267

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-07297
		FILM NUMBER:		071144579

	BUSINESS ADDRESS:	
		STREET 1:		C/O NICOR GAS
		STREET 2:		P O BOX 3014
		CITY:			NAPERVILLE
		STATE:			IL
		ZIP:			60566-7014
		BUSINESS PHONE:		6303059500

	MAIL ADDRESS:	
		STREET 1:		NICOR INC
		STREET 2:		P O BOX 3014
		CITY:			NAPERVILLE
		STATE:			IL
		ZIP:			60566-7014
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>rrd173592.xml
<DESCRIPTION>FORM 4 STOCK EQUIVALENT ACCOUNT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2007-09-28</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000072020</issuerCik>
        <issuerName>NICOR INC</issuerName>
        <issuerTradingSymbol>GAS</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001192267</rptOwnerCik>
            <rptOwnerName>RIORDAN JOHN F</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>NICOR INC.</rptOwnerStreet1>
            <rptOwnerStreet2>P.O. BOX 3014</rptOwnerStreet2>
            <rptOwnerCity>NAPERVILLE</rptOwnerCity>
            <rptOwnerState>IL</rptOwnerState>
            <rptOwnerZipCode>60566</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <derivativeTable>
        <derivativeTransaction>
            <securityTitle>
                <value>Share Units</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>0</value>
                <footnoteId id="F1"/>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2007-09-28</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>298.036</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>42.78</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <footnoteId id="F1"/>
            </exerciseDate>
            <expirationDate>
                <footnoteId id="F1"/>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>298.036</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>9909.965</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeTransaction>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">Awarded in lieu of retainers and fees under the Nicor Inc. Directors' Deferred Compensation Plan.  The director, upon retirement, is entitled to a cash payment based on the share units then held and the current market price of Nicor Common Stock.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>Antoinette M. Lambert - Attorney-in-Fact</signatureName>
        <signatureDate>2007-10-01</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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