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 State Guard at his or her discretion, making reactivation possible either through an act of legislature or by executive order. South Dakota State Guard The South Dakota State Guard is the currently inactive state defense force of South Dakota. The State Guard is recognized as a military force separate from the South Dakota National Guard. Unlike the National Guard, the State Guard is a purely state-level military force under the command of the Governor of South Dakota, and cannot be federalized or deployed outside the borders of the state. The South Dakota State Guard was active during World War I, World War