Lyman County South Dakota (Vacant / Not In Use) has 3 places on the National Register of Historic Places including 3 places of National significance. Significant places include Dinehart Village Archeological Site, Iron Nation Archeological Site and King Archeological Site.
Prehistoric cultural affiliation(s) include Plains Village, Initial Middle Missouri Variant and (Extended Coalescent Variant) dating back to 1000. Prominent architectural styles found in Lyman Country are .