Sauk City is a village in Sauk County, Wisconsin, United States. The population was 3,109 at the 2000 census. The first incorporated village in the state, the community was founded by Agoston Haraszthy and his business partner, Robert Bryant. The village is adjacent to Prairie du Sac; together, these twin villages are referred to as Sauk Prairie. Sauk City is located at 43°16′27″N 89°43′42″W / 43.27417°N 89.72833°W / 43.27417; -89.72833 (43.274130, -89.728310). It is on U.S. Highway 12, approximately 18 miles northwest of suburban Madison.