Yankton, South Dakota Yankton, South Dakota Yankton is a city in, and the county seat of, Yankton County, South Dakota, United States. The population was 14,454 at the 2010 census. Yankton is the principal city of the Yankton Micropolitan Statistical Area, which includes the entirety of Yankton County, and which had an estimated population of 22,662 as of July 1, 2017. Yankton was the first capital of Dakota Territory. It is named for the Yankton tribe of Nakota (Sioux) Native Americans; Yankton is derived from the Nakota word "I-hank-ton-wan" ("the end village"). Yankton is located on the Missouri River just downstream of the
Tribe (Native American) of a state in some situations, and that of a nation in others. Depending on the historic circumstances of recognition, the degree of self-government and sovereignty varies somewhat from one tribal nation to another. The term is defined in the United States for some federal government purposes to include only tribes that are federally recognized by the Bureau of Indian Affairs (BIA), established pursuant to the Alaska Native Claims Settlement Act [43 U.S.C. 1601 et seq.]. Such tribes, including Alaska Native village or regional or village corporations recognized as such, are known as "federally recognized tribes" and are eligible for