4 cities
| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Mount Sterling | 1 | 2,046 | 2,001 | 0.39% | 1,847 | 1 | City |
| Versailles | 2 | 458 | 446 | 0.44% | 491 | 1 | Village |
| Mound Station | 3 | 120 | 117 | 0.84% | 231 | 1 | Village |
| Ripley | 4 | 51 | 50 | 0% | 135 | 0 | Village |
Mount Sterling is the largest city in Brown County, with a population of 2,046.
Ripley is the smallest city in Brown County, with a population of 51.
There are 4 cities in Brown County, Illinois.