5 cities
| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Jennings | 1 | 9,021 | 9,798 | -1.41% | 854 | 11 | City |
| Welsh | 2 | 3,247 | 3,330 | -0.43% | 514 | 6 | Town |
| Lake Arthur | 3 | 2,550 | 2,591 | -0.27% | 1,375 | 2 | Town |
| Elton | 4 | 973 | 993 | -0.31% | 586 | 2 | Town |
| Fenton | 5 | 210 | 230 | -1.41% | 433 | 0 | Village |
Jennings is the largest city in Jefferson Davis Parish, with a population of 9,021.
Fenton is the smallest city in Jefferson Davis Parish, with a population of 210.
There are 5 cities in Jefferson Davis Parish, Louisiana.