Lake County California (Historic Districts) has 4 places on the National Register of Historic Places including 1 place of Statewide significance. Significant places include Cache Creek Archeological District, Anderson Marsh Archeological District, Rattlesnake Island.
Prehistoric cultural affiliation(s) include Elem, Tuleyomi, Koi, Archaic(Lower,Middle,Upper), Emergent(Lower,Upper), Paleoindian and Southeastern Pomo dating back to 8999 BC. Prominent architectural styles found in Lake Country are .