About ZIP code 57646
The ZIP code 57646 routes mail to Mound City in the South Dakota region of United States. Use it as the postal segment of any address in this area, and confirm unusual addresses with the local postal operator.
United States ยท ZIP code
57646 - Mound City
ZIP code 57646 is Mound City in South Dakota, United States.
| ZIP code | 57646 |
| Place | Mound City |
| Region | South Dakota |
| District | Campbell |
| Country | United States (US) |
| Coordinates | 45.6786, -100.0479 (map) |