7 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 57078 | Yankton | 20,547 |
| 57037 | Irene | 908 |
| 57031 | Gayville | 670 |
| 57072 | Volin | 547 |
| 57046 | Mission Hill | 524 |
| 57067 | Utica | 314 |
| 57040 | Lesterville | 231 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 7 ZCTAs in Yankton County, South Dakota (US Census).