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 17 South Dakota Highway 17 South Dakota Highway 17 (SD 17) is a state highway in the southeastern part of the U.S. state of South Dakota. It connects Lennox with the western edges of Sioux Falls. SD 17 formerly continued south to what is now SD 46 near Centerville. SD 17 begins at an intersection with SD 44 just south of Lennox, in the west-central part of Lincoln County. It travels to the north, on Pine Street, and almost immediately enters the city. It intersects the eastern terminus of Fourth Avenue, which is signed as a "city truck route". North of