South Dakota ( də-KOH-tə; Sioux: Dakȟóta itókaga, pronounced [daˈkˣota iˈtokaga]) is a landlocked state in the North Central region of the United States. It is also part of the Great Plains. South Dakota is named after the Dakota Sioux tribe, which comprises a large portion of the population with nine reservations currently in the state and has historically dominated the territory. South Dakota is the 17th-largest by area, but the fifth-least populous, and the fifth-least densely populated of the 50 United States.
https://en.wikipedia.org/wiki/South_Dakota