11 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 45121 | Georgetown | 9,132 |
| 45154 | Mount Orab | 8,652 |
| 45171 | Sardinia | 5,762 |
| 45130 | Hamersville | 4,116 |
| 45118 | Fayetteville | 3,663 |
| 45167 | Ripley | 3,266 |
| 45101 | Aberdeen | 2,059 |
| 45168 | Russellville | 1,159 |
| 45131 | Higginsport | 287 |
| 45115 | Decatur | 223 |
| 45119 | Feesburg | 28 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 11 ZCTAs in Brown County, Ohio (US Census).