Zip Code | City | Population |
|---|---|---|
| 21502 | Cumberland | 41,291 |
| 21532 | Frostburg | 13,229 |
| 21530 | Flintstone | 1,783 |
| 21557 | Rawlings | 1,782 |
| 21545 | Mount Savage | 1,693 |
| 21555 | Oldtown | 1,515 |
| 21524 | Corriganville | 740 |
| 21529 | Ellerslie | 575 |
| 21766 | Little Orleans | 544 |
| 21543 | Midlothian | 277 |
| 21542 | Midland | 167 |
| 21540 | Luke | 94 |
| 21560 | Spring Gap | 0 |