| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Jennings | 1 | 9,110 | 9,800 | -1.35% | 863 | 11 | City |
| Welsh | 2 | 3,275 | 3,331 | -0.33% | 518 | 6 | Town |
| Lake Arthur | 3 | 2,563 | 2,592 | -0.23% | 1,382 | 2 | Town |
| Elton | 4 | 970 | 993 | -0.41% | 584 | 2 | Town |
| Fenton | 5 | 213 | 232 | -1.84% | 439 | 0 | Village |
Jennings is the largest city in Jefferson Davis Parish, with a population of 9,110.
Fenton is the smallest city in Jefferson Davis Parish, with a population of 213.
There are 5 cities in Jefferson Davis Parish, Louisiana.