Post Offices List in Fergus County, Montana:
| Coffee Creek Post Office | 115 Main St, Coffee Creek, MT 59424 |
| Denton Post Office | 422 Broadway Ave, Denton, MT 59430 |
| Grass Range Post Office | 614 Main St, Grass Range, MT 59032 |
| Hilger Post Office | 39 Swope St, Hilger, MT 59451 |
| Lewistown Post Office | 204 3rd Ave N, Lewistown, MT 59457 |
| Moore Post Office | 201 Fergus Ave, Moore, MT 59464 |
| Roy Post Office | 228 Main St, Roy, MT 59471 |
| Winifred Post Office | 210 Main St, Winifred, MT 59489 |