| Localité | Code postal |
|---|---|
| Austintown, Mahoning | 44515 |
| Beloit, Mahoning | 44609 |
| Berlin Center, Mahoning | 44401 |
| Boardman, Mahoning | 44512 |
| Campbell, Mahoning | 44405 |
| Canfield, Mahoning | 44406 |
| Coitsville, Mahoning | 44436 |
| Columbiana, Mahoning | 44408 |
| Cornersburg, Mahoning | 44511 |
| Craig Beach, Mahoning | 44429 |
| Damascus, Mahoning | 44619 |
| Ellsworth, Mahoning | 44416 |
| Greenford, Mahoning | 44422 |
| Lake Milton, Mahoning | 44429 |
| Lowellville, Mahoning | 44436 |
| New Middletown, Mahoning | 44442 |
| New Springfield, Mahoning | 44443 |
| North Benton, Mahoning | 44449 |
| North Jackson, Mahoning | 44451 |
| North Lima, Mahoning | 44452 |
| Petersburg, Mahoning | 44454 |
| Poland, Mahoning | 44514 |
| Sebring, Mahoning | 44672 |
| Struthers, Mahoning | 44471 |
| Westville Lake, Mahoning | 44609 |
| Youngstown, Mahoning | 44501, 44502, 44503, 44504, 44505, … |