Post Offices List in Roberts County, South Dakota:
| Claire City Post Office | 270 Main St, Claire City, SD 57224 |
| Corona Post Office | 208 Main St, Corona, SD 57227 |
| New Effington Post Office | 211 Main St, New Effington, SD 57255 |
| Peever Post Office | 310 Main St, Peever, SD 57257 |
| Rosholt Post Office | 12 W Main St, Rosholt, SD 57260 |
| Sisseton Post Office | 205 E Oak St Ste 103, Sisseton, SD 57262 |
| Wilmot Post Office | 713 Main St, Wilmot, SD 57279 |
| Agency Village Post Office | 12554 Bia Highway 711 Ste 272, Sisseton, SD 57262 |