Geography of South Dakota of the federal or state government, such as Badlands National Park, Wind Cave National Park, and Custer State Park, are located in the state. In 2011, the population of South Dakota was estimated to be 824,082, and the state ranks fifth-lowest in both total population as well as population density in the United States. Sioux Falls, with a population of just over 170,000, is the largest city in the state. Rapid City ranks as South Dakota's second-largest city, and Pierre is the state capital. Historically a very agricultural state, the service and tourism sectors have grown in economic importance in
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