Hughes County, South Dakota Hughes County, South Dakota Hughes County is a county located in the U.S. state of South Dakota. As of the 2010 census, the population was 17,022, making it the least populous capital county in the nation, and the twelfth-most populous county in South Dakota. Its county seat is Pierre, the state capital. The county was created in 1873 and organized in 1880. It was named for Alexander Hughes, a legislator. Hughes County is part of the Pierre, SD Micropolitan Statistical Area. According to the U.S. Census Bureau, the county has a total area of , of which is land and
South Dakota State Penitentiary South Dakota State Penitentiary The South Dakota State Penitentiary is a state prison located in South Dakota's largest city, Sioux Falls, and holds the state's most deadly and dangerous criminals, as well as sex offenders. It was built in 1881. The building's industry shop makes several things for the state, including woodwork and license plates. The State Penitentiary also houses South Dakota's death row for men and the state's only execution chamber. The South Dakota State Penitentiary is located in northern Sioux Falls, occupying approximately thirty acres. First constructed as a territorial prison in 1881, it became the South Dakota