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 22 by 1936, and included a north–south segment from Hazel to US 212. This north–south segment was decommissioned in the 1990s. South Dakota Highway 22 Spur (SD 22 Spur) was a spur route of SD 22 that extended from the mainline, at a point south of Gary, and traveled into that city. It was established between 1965 and 1971 and was redesignated as SD 101 in 1976. South Dakota Highway 22 South Dakota Highway 22 (SD 22) is a state highway in the east-central part of the U.S. state of South Dakota. It connects Hazel, Castlewood, and Clear Lake, within the