Prehistoric cultural affiliation(s) include Koroa, Coles Creek Culture and Early Caddoan dating back to 500.
The famous person Emma Dunn is associated with one of more of the Calhoun County historic places.
Some of the country's most noteable architects helped create the Calhoun County places including PWA, Will Black, E.L. Koonce, Frank W. Gibb, Pittsburg-Des Moines Steel Co. and U.S. Army Corps of Engineers. Prominent architectural styles found in Calhoun Country are Bungalow/Craftsman and Early Commercial.