| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| North Vernon | 1 | 6,555 | 6,609 | -0.06% | 832 | 8 | City |
| Vernon | 2 | 232 | 233 | 0% | 1,121 | 0 | Town |
North Vernon is the largest city in Jennings County, with a population of 6,555.
Vernon is the smallest city in Jennings County, with a population of 232.
There are 2 cities in Jennings County, Indiana.