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 cultures in the United States missions and Indian schools in the western states, there were more opportunities for their meeting and developing relationships with Native American men. For instance, Charles Eastman, a man of European and Lakota descent whose father sent both his sons to Dartmouth College, got his medical degree at Boston University and returned to the West to practice. He married Elaine Goodale, whom he met in South Dakota. He was the grandson of Seth Eastman, a military officer from Maine, and a chief's daughter. Goodale was a young European-American teacher from Massachusetts and a reformer, who was appointed as the US superintendent