[3] It is one of the counties with territories included in the Fort Hall Indian Reservation of the federally recognized Shoshone-Bannock Tribes.

The county would get international attention in 2006 when the murder of Cassie Jo Stoddart occurred in a home located in the area.

Bonneville Peak, on the eastern border in the Portneuf Range, is the county's highest point at 9,271 feet (2,826 m) ASL; on its western slopes is the Pebble Creek ski area.

Bannock County is part of the Pocatello, Idaho Metropolitan Statistical Area.

22.80% of all households were made up of individuals, and 7.60% had someone living alone who was 65 years of age or older.

The last Democratic candidate for President to win the county was Lyndon B. Johnson in 1964.

Other elected officials include clerk, treasurer, sheriff, assessor, coroner, and prosecutor.

[17] Like the rest of eastern Idaho, Bannock County has a significant Latter Day Saint population which tends to strongly vote Republican.

However, a substantial trade union presence in the county - as well as the Idaho State University community - often gives Democrats an overall advantage, especially in local races.

Bannock County routinely elects more Democrats than Republicans to county-level offices.