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 Highway 63 South Dakota Highway 63 South Dakota Highway 63 (SD 63) is a state highway in the central portions of the U.S. state of South Dakota. It connects U.S. Route 18 (US 18) south-southeast of Parmelee with the North Dakota state line north of McLaughlin. It consists of two disconnected segments. The southern segment begins at US 18 south-southeast of Parmelee and proceeds to a rural intersection just south of Norris. The much-longer northern segment, which is long, begins at an intersection with SD 44 just south of Corn Creek and ends at the North Dakota state line north of McLaughlin,