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 Guard of the federal military. The South Dakota National Guard was federalized in 1917. By 1917, Home Guard units were organizing in various counties and townships. In 1918, the South Dakota Legislature passed legislation allowing for the creation of a Home Guard. South Dakota’s Home Guard, which was particularly active in protecting property from fire, reached a strength of 100 companies consisting of approximately 7,000 men by the end of the war. The State Guard was disbanded later in 1918. Following the federalization of the South Dakota National Guard during World War II, South Dakota raised four companies of militia using