Prehistoric cultural affiliation(s) include Red Ocher, Hopewell, Effigy Mound, Late Middle Woodland, Woodland) and Keyes Phase(Effmn dating back to 2999 BC.
The famous person John Thompson is associated with one of more of the Clayton County historic places.
Some of the country's most noteable architects helped create the Clayton County places including Works Progress Administration, US Bureau of Fisheries, W.J. Brown, Carimir Ignatius Krajewski, Howard R. Green, E.C.W. Jacobs and Rev. Joseph H. Brinkman. Prominent architectural styles found in Clayton Country are Italianate, Greek Revival and Late Victorian.