Fremont County Idaho (Historic Districts) has 3 places on the National Register of Historic Places including 1 place of National significance and 1 place of Statewide significance. Significant places include Island Park Land and Cattle Company Home Ranch and Bishop Mountain Lookout, Island Park Land and Cattle Company Home Ranch.
Some of the country's most noteable architects helped create the Fremont County places including Civilian Conservation Corps and unknown. Prominent architectural styles found in Fremont Country are .