| Year | Population |
|---|---|
| 1990. | 19252 |
| 2010. | 22438 |
| 1980. | 18933 |
| 2000. | 21652 |
www.co.yankton.sd.us
South Dakota
Yankton County
County
46135
County seat is in Yankton
Founded in 1862
Area: 522 square miles
County board has 5 members
FIPS code: 46135
Zipcodes in Yankton County: 57046, 57078, 57079, 57031, 57067, 57040, 57072
Freng Donna
Hunhoff Brian
Jensen Bruce
Johnson Mark
Jones Paula
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