| Post Office Name | City/State | Address | Action |
|---|---|---|---|
| Bridgewater Post Office | Bridgewater, SD 57319 | 235 N Main Ave | View Details Get Directions |
| Canistota Post Office | Canistota, SD 57012 | 222 W Main St | View Details Get Directions |
| Canova Post Office | Canova, SD 57321 | 120 Main St W | View Details Get Directions |
| Emery Post Office | Emery, SD 57332 | 124 N 3rd St | View Details Get Directions |
| Humboldt Post Office | Humboldt, SD 57035 | 1005 W 2nd Ave | View Details Get Directions |
| Marion Post Office | Marion, SD 57043 | 209 N Broadway Ave | View Details Get Directions |
| Montrose Post Office | Montrose, SD 57048 | 105 W Main St | View Details Get Directions |
| Parker Post Office | Parker, SD 57053 | 125 S Main Ave | View Details Get Directions |
| Salem Post Office | Salem, SD 57058 | 311 N Main St | View Details Get Directions |
| Spencer Post Office | Spencer, SD 57374 | 306 Main St | View Details Get Directions |
| Humboldt Village Post Office | Humboldt, SD 57035 | 1003 W 2nd Ave | Get Directions |
| Public Collection Box | Salem, SD 57058 | 25315 Us Highway 81 | Get Directions |
| Public Collection Box | Spencer, SD 57374 | 25678 431st Ave | Get Directions |
