Prehistoric cultural affiliation(s) include Scottsbluff, Folsom and Middle Archaic dating back to 9999 BC.
The famous person W.C. Child is associated with one of more of the Jefferson County historic places.
Some of the country's most noteable architects helped create the Jefferson County places including Able Quaintance, C.W. Kerrick, John Suite, J.S. MacKenzie, John C. Paulsen, Paulsen & McConnell and Louis Krueger. Prominent architectural styles found in Jefferson Country are Renaissance, Greek Revival and Italianate.