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
Native American Day designed to promote greater understanding and brotherhood between American Indians and the non-Indian people of the state of Tennessee". Native American Day Native American Day is a holiday in the U.S. states of California and Nevada celebrated annually on the fourth Friday of September, as well as in South Dakota on the second Monday in October in lieu of Columbus Day. It honors Native American cultures and contributions to their respective states and the United States. The state of Tennessee observes a similar American Indian Day each year on the fourth Monday of September. In 1968, Governor Ronald Reagan signed