Pierre (/ ˈ p ɪər /; Lakota: čhúŋkaške, "fort") is the state capital of the U.S. 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 in the United States after Montpelier , Vermont , and the eighth-most populous city in South Dakota .
