Prehistoric cultural affiliation(s) include Patwin dating back to 1000.
The famous person Father Michael Wallrath is associated with one of more of the Colusa County historic places.
Some of the country's most noteable architects helped create the Colusa County places including Alden Campbell, George C. Sellon, Henry C. Smith, W.H. Weeks, J.S. Hannah, Louis S. Stone and Father Michael Wallrath. Prominent architectural styles found in Colusa Country are Bungalow/Craftsman, Classical Revival and Colonial Revival.