Prehistoric cultural affiliation(s) include Middle Archaic dating back to 5499 BC.
The famous person Isaac Herschel Goodnight is associated with one of more of the Simpson County historic places.
Some of the country's most noteable architects helped create the Simpson County places including McDonald Brothers, Nathan Salmons, Randolph Gilbert Moore, Andrew Jackson Hampton, Benjamin Hampton and Alex W. Brown. Prominent architectural styles found in Simpson Country are Greek Revival, Bungalow/Craftsman and Italianate.