| Locality | Post Code |
|---|---|
| Aberdeen, Brown | 45101 |
| Ash Ridge, Brown | 45121 |
| Bardwell, Brown | 45154 |
| Brown County, Brown | 45121 |
| Browntown, Brown | 45121 |
| Buford, Brown | 45171 |
| Byrd, Brown | 45115 |
| Clermont County, Brown | 45121 |
| Decatur, Brown | 45115 |
| Ellsberry, Brown | 45101 |
| Fayetteville, Brown | 45118 |
| Feesburg, Brown | 45119 |
| Five Mile, Brown | 45154 |
| Georgetown, Brown | 45121 |
| Hamersville, Brown | 45130 |
| Higginsport, Brown | 45131 |
| Hillman, Brown | 45121 |
| Lake Waynoka, Brown | 45171 |
| Marathon, Brown | 45118 |
| Mount Orab, Brown | 45154 |
| Poetown, Brown | 45130 |
| Redoak, Brown | 45167 |
| Ripley, Brown | 45167 |
| Russellville, Brown | 45168 |
| Saint Martin, Brown | 45118 |
| Sardinia, Brown | 45171 |