Yankton, South Dakota
Located in Yankton County
Yankton is a city in the county seat of Yankton County, South Dakota. It was the first capital of Dakota Territory and is also known as the “Mother City of the Dakotas”, due to the early important role it played in the creation and development of the Dakota Territory, which later became the 39th and 40th U.S. states of North and South Dakota.. Located on the Missouri River just downstream of the Gavins Point Dam and Lewis and Clark Lake and just upstream of the confluence with the James River.