Prehistoric cultural affiliation(s) include Paleo-Indian, Archaic, Austin & Toyah, Mexican, German and American Indian dating back to 6999 BC.
The famous person Lyndon B. Johnson is associated with one of more of the Gillespie County historic places.
Some of the country's most noteable architects helped create the Gillespie County places including Alfred Giles, Jacob Wagner and Leo M.J. Dielmann. Prominent architectural styles found in Gillespie Country are Bungalow/Craftsman, Colonial Revival and Gothic Revival.