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 72 branches and over 100 ATMs in Montana, Wyoming, and western South Dakota. A leader in community banking services, First Interstate is committed to a banking philosophy focused on local management and decision making, exceeding customer expectations with exemplary products and services, and supporting, with leadership and resources, the communities it serves.