Union County
County in South Dakota
Union County is the southernmost county in the U.S. state of South Dakota. As of the 2020 census, the population was 16,811, making it the 13th most populous county in South Dakota. Its county seat has been Elk Point since April 30, 1865. Wikipedia
Population: 17,063 (2022)
Cities: Elk Point, Dakota Dunes, North Sioux City, and more
Area: 467 mi²
Seat: Elk Point