First Interstate Bank is a multi-state, $7.1 billion banking organization headquartered in Billings, Montana. First Interstate has evolved since 1968 from a single bank in Sheridan, Wyoming to operating 71 branches and over 100 ATMs in Montana, Wyoming, and South Dakota.
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.
First Interstate Bank will consistently strive to set itself apart as a high performance, multi-state financial services company.
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