Yankton County | |
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Scottish Rite Masonic Center in Yankton. | |
![]() Location within the U.S. state of South Dakota | |
![]() South Dakota's location within the U.S. | |
Coordinates: 43°01′N 97°23′W / 43.01°N 97.39°W | |
Country | ![]() |
State | ![]() |
Founded | April 10, 1862 |
Named for | Yankton Sioux |
Seat | Yankton |
Largest city | Yankton |
Area | |
• Total | 532 sq mi (1,380 km2) |
• Land | 521 sq mi (1,350 km2) |
• Water | 11 sq mi (30 km2) 2.1% |
Population (2020) | |
• Total | 23,310 |
• Estimate (2023) | 23,517 ![]() |
• Density | 44/sq mi (17/km2) |
Time zone | UTC−6 (Central) |
• Summer (DST) | UTC−5 (CDT) |
Congressional district | At-large |
Website | www |
Yankton County is a county in the U.S. state of South Dakota. As of the 2020 census, the population was 23,310, making it the 9th most populous county in South Dakota.[1] Its county seat is Yankton.[2] Yankton County comprises the Yankton, SD Micropolitan Statistical Area.