| Locality | Post Code |
|---|---|
| Allen Springs, Warren | 42122 |
| Alvaton, Warren | 42122 |
| Blue Level, Warren | 42274 |
| Bowling Green, Warren | 42101, 42102, 42103, 42104 |
| Browning, Warren | 42274 |
| Cavehill, Warren | 42274 |
| Drake, Warren | 42128 |
| Hadley, Warren | 42101 |
| Oakland, Warren | 42159 |
| Petros, Warren | 42274 |
| Plum Springs, Warren | 42101 |
| Richardsville, Warren | 42101 |
| Rockfield, Warren | 42274 |
| Smiths Grove, Warren | 42171 |
| Woodburn, Warren | 42170 |