7 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 57078 | Yankton | 20,383 |
| 57037 | Irene | 925 |
| 57031 | Gayville | 784 |
| 57046 | Mission Hill | 521 |
| 57072 | Volin | 435 |
| 57067 | Utica | 348 |
| 57040 | Lesterville | 222 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 7 ZCTAs in Yankton County, South Dakota (US Census).