6 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Hamblen township | 1 | 4,548 | 4,455 | 0.44% | 71 | 63.98 | Township |
| Jackson township | 2 | 4,037 | 3,960 | 0.42% | 66 | 61.61 | Township |
| Smithville-Sanders | 3 | 3,078 | 3,411 | -0.23% | 287 | 10.72 | CDP |
| Cordry Sweetwater Lakes | 4 | 1,378 | 1,323 | 1.25% | 517 | 2.67 | CDP |
| Prince's Lakes | 5 | 1,368 | 1,375 | -0.07% | 1,023 | 1.34 | Town |
| Nashville | 6 | 1,271 | 1,256 | 0.24% | 793 | 1.60 | Town |
Hamblen township is the largest city in Brown County, with a population of 4,548.
Nashville is the smallest city in Brown County.
There are 6 cities in Brown County, Indiana.