Sioux County Nebraska (Historic Districts) has 5 places on the National Register of Historic Places including 2 places of National significance and 2 places of Statewide significance. Significant places include Cook, Harold J., Homestead Cabin, Fort Robinson and Red Cloud Agency, Cook, Harold J., Homestead Cabin and Wind Springs Ranch Historic and Archeological District and Sioux County Courthouse.
Prehistoric cultural affiliation(s) include Paleoindian, Archaic and Woodland dating back to 5999 BC.
Some of the country's most noteable architects helped create the Sioux County places including Harold J. Cook and E.L. Goldsmith. Prominent architectural styles found in Sioux Country are Bungalow/Craftsman, Classical Revival and Late 19th And Early 20th Century American Movements.