FIRST INTERSTATE BANCSYSTEM, INC.
401 North 31st Street
Billings, Montana 59116
July 2, 2018
VIA EDGAR
Securities and Exchange Commission
100 F Street, N.E.
Washington, D.C. 20549
| Re: | First Interstate BancSystem, Inc. |
| Registration Statement on FormS-4 (Registration Number333-225521) |
| Request for Acceleration of Effectiveness |
Ladies and Gentlemen:
First Interstate BancSystem, Inc., a Montana corporation (the “Company”), hereby requests that the Company’s Registration Statement on FormS-4 be declared effective on July 3, 2018 at 12:00 p.m., or as soon thereafter as is practicable.
| Very Truly Yours, |
| /s/ Kirk D. Jensen |
| Kirk D. Jensen |
| Executive Vice President and General Counsel |
