4 cities
| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Seymour | 1 | 22,757 | 22,058 | 0.52% | 1,714 | 13 | City |
| Brownstown | 2 | 3,103 | 3,024 | 0.42% | 1,917 | 2 | Town |
| Crothersville | 3 | 1,523 | 1,504 | 0.2% | 1,313 | 1 | Town |
| Medora | 4 | 651 | 638 | 0.31% | 2,141 | 0 | Town |
Seymour is the largest city in Jackson County, with a population of 22,757.
Medora is the smallest city in Jackson County, with a population of 651.
There are 4 cities in Jackson County, Indiana.