| Localité | Code postal |
|---|---|
| Calcutta, Columbiana | 43920 |
| Clarkson, Columbiana | 44455 |
| Columbiana, Columbiana | 44408 |
| East Liverpool, Columbiana | 43920 |
| East Palestine, Columbiana | 44413 |
| East Rochester, Columbiana | 44625 |
| Elkton, Columbiana | 44415 |
| Hanoverton, Columbiana | 44423 |
| Homeworth, Columbiana | 44634 |
| Kensington, Columbiana | 44427 |
| Leetonia, Columbiana | 44431 |
| Lisbon, Columbiana | 44432 |
| Negley, Columbiana | 44441 |
| New Alexander, Columbiana | 44625 |
| New Garden, Columbiana | 44423 |
| New Waterford, Columbiana | 44445 |
| North Georgetown, Columbiana | 44665 |
| Patmos, Columbiana | 44460 |
| Rogers, Columbiana | 44455 |
| Salem, Columbiana | 44460 |
| Salineville, Columbiana | 43945 |
| Summitville, Columbiana | 43962 |
| Washingtonville, Columbiana | 44490 |
| Wellsville, Columbiana | 43968 |
| West Point, Columbiana | 44492 |
| Winona, Columbiana | 44493 |