2 cities
| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| North Vernon | 1 | 6,546 | 6,603 | -0.14% | 831 | 8 | City |
| Vernon | 2 | 234 | 234 | 0% | 1,130 | 0 | Town |
North Vernon is the largest city in Jennings County, with a population of 6,546.
Vernon is the smallest city in Jennings County, with a population of 234.
There are 2 cities in Jennings County, Indiana.