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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
Originator-Key-Asymmetric:
 MFgwCgYEVQgBAQICAf8DSgAwRwJAW2sNKK9AVtBzYZmr6aGjlWyK3XmZv3dTINen
 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 Cuo3ETXU66goGZZFjMslqjckfV71pgorWbZb6K7CaHCR7H2Jx0gISSApvlKFwXWU
 0V5PSxtp4ePMNGhA35CDZw==

<SEC-DOCUMENT>9999999995-06-001950.txt : 20061019
<SEC-HEADER>9999999995-06-001950.hdr.sgml : 20061019
<ACCEPTANCE-DATETIME>20061019001522
ACCESSION NUMBER:		9999999995-06-001950
CONFORMED SUBMISSION TYPE:	EFFECT
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20061018
DATE AS OF CHANGE:		20061019
EFFECTIVENESS DATE:		20061018

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			ILLINOIS POWER CO
		CENTRAL INDEX KEY:			0000049816
		STANDARD INDUSTRIAL CLASSIFICATION:	ELECTRIC & OTHER SERVICES COMBINED [4931]
		IRS NUMBER:				370344645
		STATE OF INCORPORATION:			IL
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		EFFECT
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	333-137448
		FILM NUMBER:		061151961

	BUSINESS ADDRESS:	
		STREET 1:		500 S 27TH ST
		STREET 2:		C/O HARRIS TRUST & SAVINGS BANK
		CITY:			DECATUR
		STATE:			IL
		ZIP:			62525-1805
		BUSINESS PHONE:		2174246600

	MAIL ADDRESS:	
		STREET 1:		500 SOUTH 27TH STREET
		CITY:			DECATUR
		STATE:			IL
		ZIP:			62521

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	ILLINOIS IOWA POWER CO
		DATE OF NAME CHANGE:	19660822
</SEC-HEADER>
<DOCUMENT>
<TYPE>EFFECT
<SEQUENCE>1
<FILENAME>primary_doc.xml
<TEXT>
<XML>
<?xml version="1.0"?>
<edgarSubmission>

    <schemaVersion>X0101</schemaVersion>

    <submissionType>EFFECT</submissionType>

    <act>33</act>

    <testOrLive>LIVE</testOrLive>

    <effectiveData>
        <finalEffectivenessDispDate>2006-10-18</finalEffectivenessDispDate>
        <form>S-4</form>
        <filer>
            <cik>0000049816</cik>
            <entityName>ILLINOIS POWER CO</entityName>
            <fileNumber>333-137448</fileNumber>
        </filer>
    </effectiveData>
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</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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