Yankton
- Country: United States
- State: South Dakota
- Population: 14,566 (2016)
- Latitude: 42° 52.3' N (42.87111°)
- Longitude: 97° 23.8' W (-97.39728°)
- Elevation: 369 m/1,211 ft. above sea level
- Time zone: America/Chicago (UTC -06:00); DST observed (UTC -05:00)