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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,
 NsrB0D8UXf63sObNoFS+u3iO8w5uN75eNeazfhDU28rJpkGlWMc+FGbXNFU7P4Mo
 7ddaUZxrrgZucXmm0OSvCw==

<SEC-DOCUMENT>0001209191-03-035329.txt : 20031216
<SEC-HEADER>0001209191-03-035329.hdr.sgml : 20031216
<ACCEPTANCE-DATETIME>20031216151504
ACCESSION NUMBER:		0001209191-03-035329
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20031208
FILED AS OF DATE:		20031216

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			SCOTT JAMES R
		CENTRAL INDEX KEY:			0001198533

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-49733
		FILM NUMBER:		031057287

	MAIL ADDRESS:	
		STREET 1:		C/O FIRST INTERSTATE BANCSYSTEM INC
		STREET 2:		P O BOX 30918
		CITY:			BILLINGS
		STATE:			MT
		ZIP:			59116

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			FIRST INTERSTATE BANCSYSTEM INC
		CENTRAL INDEX KEY:			0000860413
		STANDARD INDUSTRIAL CLASSIFICATION:	STATE COMMERCIAL BANKS [6022]
		IRS NUMBER:				810331430
		STATE OF INCORPORATION:			MT
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		P O BOX 30918
		STREET 2:		401 NO 31ST STREET
		CITY:			BILLINGS
		STATE:			MT
		ZIP:			59116-0918
		BUSINESS PHONE:		4062555300

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	FIRST INTERSTATE BANCSYSTEM OF MONTANA INC
		DATE OF NAME CHANGE:	19930615
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>doc4.xml
<DESCRIPTION>FORM 4 SUBMISSION
<TEXT>
<XML>
<?xml version="1.0"?><ownershipDocument><schemaVersion>X0201</schemaVersion>    <documentType>4</documentType><periodOfReport>2003-12-08</periodOfReport><notSubjectToSection16>0</notSubjectToSection16><issuer><issuerCik>0000860413</issuerCik><issuerName>FIRST INTERSTATE BANCSYSTEM INC</issuerName>        <issuerTradingSymbol>N/A</issuerTradingSymbol></issuer><reportingOwner><reportingOwnerId><rptOwnerCik>0001198533</rptOwnerCik><rptOwnerName>SCOTT JAMES R</rptOwnerName></reportingOwnerId><reportingOwnerAddress><rptOwnerStreet1>PO BOX 7113</rptOwnerStreet1><rptOwnerStreet2></rptOwnerStreet2><rptOwnerCity>BILLINGS</rptOwnerCity><rptOwnerState>MT</rptOwnerState><rptOwnerZipCode>59103</rptOwnerZipCode><rptOwnerStateDescription></rptOwnerStateDescription></reportingOwnerAddress><reportingOwnerRelationship><isDirector>1</isDirector><isOfficer>0</isOfficer><isTenPercentOwner>1</isTenPercentOwner><isOther>0</isOther></reportingOwnerRelationship></reportingOwner><nonDerivativeTable><nonDerivativeTransaction><security
Title><value>Common Stock</value></securityTitle><transactionDate><value>2003-12-08</value></transactionDate><deemedExecutionDate></deemedExecutionDate><transactionCoding><transactionFormType>5</transactionFormType><transactionCode>G</transactionCode><equitySwapInvolved>0</equitySwapInvolved></transactionCoding><transactionTimeliness><value>E</value></transactionTimeliness><transactionAmounts><transactionShares><value>2768.0000</value></transactionShares><transactionPricePerShare><value>49.5000</value></transactionPricePerShare><transactionAcquiredDisposedCode><value>D</value></transactionAcquiredDisposedCode></transactionAmounts><postTransactionAmounts><sharesOwnedFollowingTransaction><value>604488.0000</value></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>I</value></directOrIndirectOwnership><natureOfOwnership><value>By Self as Co-Trustee</value></natureOfOwnership></ownershipNature></nonDerivativeTransaction></nonDerivativeTable><footnotes></f
ootnotes><remarks></remarks><ownerSignature><signatureName>/s/:  Terrill R. Moore, Attorney in Fact for Reporting Person</signatureName><signatureDate>2003-12-16</signatureDate></ownerSignature></ownershipDocument>

</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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