Prehistoric cultural affiliation(s) include Caddoan (Pawnee) and Coalescent Villagers dating back to 1999 BC.
The famous person Charles H. Morrill is associated with one of more of the Polk County historic places.
Some of the country's most noteable architects helped create the Polk County places including Ludwig Rudeen. Prominent architectural styles found in Polk Country are Bungalow/Craftsman.