Pierre (/ˈpɪər/ PEER) (Lakota: čhúŋkaške; "fort") is the capital of the state of South Dakota and the county seat of Hughes County. The population was 13,646 at the 2010 census, making it the second least populous state capital after Montpelier, Vermont. Founded in 1880 on the Missouri River opposite Fort Pierre, Pierre has been the capital since South Dakota gained statehood on November 2, 1889, having been chosen for its location in the geographic center of the state. Fort Pierre itself was named after Pierre Chouteau, Jr., an American fur trader of French origin.
Pierre is the principal city of the Pierre Micropolitan Statistical Area, which includes all of Hughes and Stanley counties.(Wikipedia)