Kootenai County Idaho (Historic Districts) has 5 places on the National Register of Historic Places including 2 places of Statewide significance. Significant places include Fort Sherman Buildings and Spirit Lake Historic District, Harrison Commercial Historic District, Lake Pend Oreille Lime and Cement Industry Historic District and Sherman Park Addition.
Some of the country's most noteable architects helped create the Kootenai County places including US Army and unknown. Prominent architectural styles found in Kootenai Country are Bungalow/Craftsman, Late 19th And 20th Century Revivals and Late Victorian.