Post Offices List in Cumberland County, Illinois:
| Greenup Post Office | 125 E Cumberland St, Greenup, IL 62428 |
| Jewett Post Office | 1100 Cumberland Rd, Jewett, IL 62436 |
| Montrose Post Office | 301 W National Rd, Montrose, IL 62445 |
| Neoga Post Office | 256 E 6th St, Neoga, IL 62447 |
| Toledo Post Office | 112 Courthouse Sq, Toledo, IL 62468 |
| Trilla Post Office | 102 W Trilla Rd, Trilla, IL 62469 |