Prehistoric cultural affiliation(s) include Windust Phase, Cascade Phase, Nimipu Phase, Tucannon Phase, Chinese and Et Al. dating back to 10999 BC.
The famous person Frances Zaunmiller Wisner is associated with one of more of the Idaho County historic places.
Some of the country's most noteable architects helped create the Idaho County places including Jack Parsell, William Fox, Jim Moore, C.E. Churchill, US Forest Service, Aiken, Joe,, USFS and Warren Cook. Prominent architectural styles found in Idaho Country are .