| Locality | Post Code |
|---|---|
| Blue Ball, Warren | 45005 |
| Butlerville, Warren | 45162 |
| Carlisle, Warren | 45005 |
| Corwin, Warren | 45068 |
| Edenton, Warren | 45162 |
| Foster, Warren | 45039 |
| Franklin, Warren | 45005 |
| Hamilton, Warren | 45039 |
| Harveysburg, Warren | 45032 |
| Kings Island, Warren | 45034 |
| Kings Mills, Warren | 45034 |
| Landon, Warren | 45039 |
| Lebanon, Warren | 45036 |
| Lytle, Warren | 45068 |
| Maineville, Warren | 45039 |
| Mason, Warren | 45040 |
| Massie, Warren | 45032 |
| Middletown, Warren | 45005 |
| Morrow, Warren | 45152 |
| Mount Holly, Warren | 45068 |
| Oregonia, Warren | 45054 |
| Pleasant Plain, Warren | 45162 |
| South Lebanon, Warren | 45065 |
| Springboro, Warren | 45066 |
| Waynesville, Warren | 45068 |