Custer County Idaho (Vacant / Not In Use) has 5 places on the National Register of Historic Places including 2 places of Statewide significance. Significant places include Challis Brewery Historic District and East Fork Lookout, Idaho Mining and Smelter Company Store, Mackay Episcopal Church and Mackay Methodist Episcopal Church.
Prehistoric cultural affiliation(s) include Native American dating back to 1000.
Some of the country's most noteable architects helped create the Custer County places including John E. & Company Tourtellotte. Prominent architectural styles found in Custer Country are Late 19th And Early 20th Century American Movements.