Pocatello (IPA: [po kə tɛ lo]) is the county seat and largest city of Bannock County^GR6 , with a small portion in neighboring Power County, in southeastern Idaho. As of the 2000 census Pocatello population was 51,466 (2004 estimate: 52,910). Pocatello routinely switches places with Idaho Falls as the third largest city in the state and the largest city in the Eastern Idaho region.

Pocatello is home of Idaho State University. Founded as an important stop on the first railroad in Idaho during the gold rush, the city later became an important center for agriculture. It is located along the Portneuf River where it emerges from the mountains onto the Snake River Plain, along the route of the Oregon Trail. The name comes from Chief Pocatello, a chief of the Shoshoni who granted the right-of-way for the railroad across the Fort Hall Indian Reservation.

Pocatello is the principal city of the Pocatello, ID Metropolitan Statistical Area, which includes Bannock and Power Counties.