| Locality | Post Code |
|---|---|
| Barton, Allegany | 21521 |
| Corriganville, Allegany | 21524 |
| Cresaptown, Allegany | 21502 |
| Cumberland, Allegany | 21501, 21502 |
| Eckhart Mines, Allegany | 21528 |
| Ellerslie, Allegany | 21529 |
| Flintstone, Allegany | 21530 |
| Frostburg, Allegany | 21532 |
| Lavale, Allegany | 21502 |
| Little Orleans, Allegany | 21766 |
| Lonaconing, Allegany | 21539 |
| Luke, Allegany | 21540 |
| McCoole, Allegany | 21562 |
| Midland, Allegany | 21542, 21532 |
| Midlothian, Allegany | 21543 |
| Mount Savage, Allegany | 21545 |
| Oldtown, Allegany | 21555 |
| Pinto, Allegany | 21556 |
| Rawlings, Allegany | 21557 |
| Spring Gap, Allegany | 21560 |
| Westernport, Allegany | 21562 |