Prehistoric cultural affiliation(s) include Nez Perce, Numipu and Salishan dating back to 6999 BC.
The famous person Cassius C. Van Arsdol is associated with one of more of the Asotin County historic places.
Some of the country's most noteable architects helped create the Asotin County places including J.D. McGovern, Washington St. Dept. of Transportion, Louis A. Simon, Henry Howard, Washington State Highway Dept. and Henry Hagman. Prominent architectural styles found in Asotin Country are Colonial Revival, Early Commercial and Gothic.