First Interstate Bank
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FIRST INTERSTATE BANK is a multi-state, $4.6 billion banking organization headquartered in Billings, Montana. First Interstate has evolved since 1968 from a single bank in Sheridan, Wyoming to operating 49 branches and 130 ATMs in Montana and Wyoming.

First Interstate Bank is the principal subsidiary of First Interstate BancSystem, Inc., a financial holding company.

In 1984, our company purchased a franchise agreement with First Interstate Bancorp to use the First Interstate Bank name and logo. In 1996, when First Interstate Bancorp of California merged with another banking institution, our bank negotiated to retain the First Interstate name. We now serve 30 communities across Montana and Wyoming.



Phone Number:

(800) 752-3341 / 9AM - 5PM Mon - Fri


401 North 31st. St.
P.O. Box 30918
Billings, MT 59116-0918

Minimum Balance:

$200 (savings account), varies (CDs)


compounded daily

Current Savings Account Rates:


Current CD Rates:



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