Prehistoric cultural affiliation(s) include Protohistoric/Sioux, Historic/Sioux, Late Prehistoric, Late Prehistoric Native American, Late To Middle Archaic, Late Archaic, Early Archaic, Middle Archaic and Mckean Cultu dating back to 6999 BC.
Several famous people are associated with these Custer County historic places including Badger Clark, Peter Norbeck and Norman and Harry Streeter.
Some of the country's most noteable architects helped create the Custer County places including Phelps Wyman, Monroe Nystrom, Berge Bergeland, C.C. Gideon, Mullen & Rourke, Civilian Conservation Corps, SD State Highway Commission, A. Burnham, Badger Clark and CCC. Prominent architectural styles found in Custer Country are Late 19th And Early 20th Century American Movements, Stick/Eastlake and Bungalow/Craftsman.