FIRST INTERSTATE BANCSYSTEM INC — Declaration of Voting Results & Voting Rights Announcements 2010

May 11, 2010

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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): May 7, 2010

FIRST INTERSTATE BANCSYSTEM, INC.

(Exact name of registrant as specified in its charter)

Montana	001-34653	81-0331430
(State or other jurisdiction of incorporation or organization)	(Commission File No.)	(IRS Employer Identification No.)

401 North 31 st Street, Billings, MT 59101

(Address of principal executive offices)

(406) 255-5390

(Registrant’s telephone number, including area code)

Not Applicable

(Former name or former address, if changed since last report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the Registrant under any of the following provisions:

o Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

o Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

o Pre-commencement communications pursuant to Rule 14d-2(b) under Exchange Act (17 CFR 240.14d-2(b))

o Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

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link2 "Item 5.07 Submission of Matters to a Vote of Security Holders"

Item 5.07 Submission of Matters to a Vote of Security Holders

On May 7, 2010, First Interstate BancSystem, Inc. (the “Registrant”) held an annual meeting of its shareholders. The proposals voted upon at the annual meeting and the voting results for each proposal are as follows:

Proposal No. 1 — To elect as directors the nominees proposed by the board of directors of the Registrant, to three-year terms expiring in 2013, or until their respective successors have been elected and qualified.

Nominee — David H. Crum	124,479,420	9,060	1,374,700	0
William B. Ebzery	125,720,040	131,660	11,480	0
John M.
Heyneman, Jr.	123,721,660	61,180	2,080,340	0
Terry W. Payne	124,720,640	11,080	1,131,460	0
Sandra A. Scott Suzor	123,273,920	7,320	2,581,940	0

Proposal No. 2 — To ratify the appointment of McGladrey & Pullen, LLP as the Registrant’s independent registered public accounting firm for the fiscal year ending December 31, 2010.

For	Against	Abstain	Broker non-votes
123,746,240	700	2,116,240	0

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link1 " SIGNATURE"

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: May 11, 2010

FIRST INTERSTATE BANCSYSTEM, INC.
By:	/s/ LYLE R. KNIGHT
	Lyle R. Knight
	President and Chief Executive Officer

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