11 cities
| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Hiawatha | 1 | 3,081 | 3,249 | -0.9% | 1,189 | 3 | City |
| Horton | 2 | 1,432 | 1,519 | -0.97% | 808 | 2 | City |
| Everest | 3 | 244 | 259 | -0.81% | 1,052 | 0 | City |
| Fairview | 4 | 229 | 240 | -0.87% | 668 | 0 | City |
| Morrill | 5 | 205 | 219 | -0.97% | 1,030 | 0 | City |
| Robinson | 6 | 169 | 181 | -1.17% | 738 | 0 | City |
| Reserve | 7 | 67 | 72 | -1.47% | 583 | 0 | City |
| Powhattan | 8 | 66 | 69 | 0% | 482 | 0 | City |
| Leona | 9 | 36 | 36 | 0% | 571 | 0 | City |
| Hamlin | 10 | 34 | 36 | 0% | 391 | 0 | City |
| Willis | 11 | 27 | 29 | 0% | 165 | 0 | City |
Hiawatha is the largest city in Brown County, with a population of 3,081.
Willis is the smallest city in Brown County, with a population of 27.
There are 11 cities in Brown County, Kansas.