UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                              WASHINGTON D.C. 20549

                                    FORM 8-K
                                 CURRENT REPORT


     PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934



Date of report (date of earliest event reported): July 23, 2002

                        FIRST INTERSTATE BANCSYSTEM, INC.
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             (Exact name of registrant as specified in its charter)



           MONTANA                   33-64304                   81-0331430
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(State or other jurisdiction of    (Commission                 (IRS Employer
 incorporation or organization)     File No.)                Identification No.)


                       401 NORTH 31ST STREET, BILLINGS, MT
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                    (Address of principal executive offices)


                                 (406) 255-5390
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              (Registrant's telephone number, including area code)


                                 NOT APPLICABLE
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          (Former name or former address, if changed since last report)








     Item 1.    Not Applicable.

     Item 2.    Not Applicable.

     Item 3.    Not Applicable.

     Item 4.    Not Applicable.

     Item 5.    Other Events and Regulation FD Disclosure.

                On July 23, 2002, First Interstate BancSystem, Inc. issued its
                second quarter 2002 performance report and shareholders' letter
                ("Shareholders' Letter") to holders of common stock of the
                Company as of July 23, 2002.

                Certain statements contained in the Shareholders' Letter
                constitute "forward-looking statements" that involve risk and
                uncertainties. The Company wishes to caution readers that the
                following factors, among others may cause the actual results,
                performance or achievements of the Company to be materially
                different from any future results, performance or achievements
                expressed or implied by such forward-looking statements. Such
                factors include general economic and business conditions in
                those areas in which the Company operates, credit quality,
                demographic changes, competition, fluctuations in interest
                rates, changes in business strategy or development plans and
                changes in governmental regulations. These and other risk
                factors are set forth from time to time in the Company's reports
                filed with the Securities and Exchange Commission.

                The Shareholders' Letter is attached as Exhibit 99 to the
                Current Report on Form 8-K.

     Item 6.    Not Applicable.

     Item 7.    Financial Statements and Exhibits.

                (a)  Not Applicable.

                (b)  Not Applicable.

                (c)  Exhibit 99  Second Quarter 2002 Shareholders' Letter.

     Item 8.    Not Applicable.

     Item 9.    Not Applicable.








                                    SIGNATURE

              Pursuant to the requirements of the Securities and Exchange Act of
     1934, as amended, the Registrant has duly caused this report to be signed
     on its behalf by the undersigned hereunto duly authorized.

     Dated:  July 23, 2002

                                  FIRST INTERSTATE BANCSYSTEM, INC.



                                  By:      /s/ THOMAS W. SCOTT
                                        ----------------------------------------
                                        Thomas W. Scott
                                        Chief Executive Officer