9 cities
| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Georgetown | 1 | 4,519 | 4,456 | 0.24% | 1,088 | 4 | Village |
| Mount Orab | 2 | 4,423 | 4,353 | 0.27% | 457 | 10 | Village |
| Ripley | 3 | 1,598 | 1,577 | 0.25% | 803 | 2 | Village |
| Aberdeen | 4 | 1,555 | 1,515 | 0.45% | 1,152 | 1 | Village |
| Sardinia | 5 | 1,119 | 1,088 | 0.45% | 638 | 2 | Village |
| Russellville | 6 | 551 | 542 | 0.36% | 756 | 1 | Village |
| Hamersville | 7 | 499 | 492 | 0.2% | 1,139 | 0 | Village |
| Fayetteville | 8 | 318 | 314 | 0.32% | 674 | 0 | Village |
| Higginsport | 9 | 219 | 215 | 0.46% | 873 | 0 | Village |
Georgetown is the largest city in Brown County, with a population of 4,519.
Higginsport is the smallest city in Brown County, with a population of 219.
There are 9 cities in Brown County, Ohio.