Prehistoric cultural affiliation(s) include Middle Woodland, Upper Mississippian and Protohistoric dating back to 0.
The famous person Mary Terry is associated with one of more of the Delta County historic places.
Some of the country's most noteable architects helped create the Delta County places including United States Lighthouse Service, U.S. Lighthouse Board, Baldwin Locomotive Company, Theodore Lohff, U.S. Lighthouse Service, Delta Contracting Co., U.S. Lighthouse Service 12th Dist. and Office of Supt. of Lighthouses. Prominent architectural styles found in Delta Country are Classical Revival and Late Victorian.