.
Union ZIP Codes — South Dakota (SD)
| City or Location | County or District | States or Territories | States or Territories Abbrieviation | ZIP Code or Postcode |
|---|---|---|---|---|
| Alcester | Union | South Dakota | SD | 57001 |
| Beresford | Union | South Dakota | SD | 57004 |
| Elk Point | Union | South Dakota | SD | 57025 |
| Jefferson | Union | South Dakota | SD | 57038 |
| North Sioux City | Union | South Dakota | SD | 57049 |
.