| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Kenner | 1 | 64,911 | 66,281 | -0.35% | 4,360 | 15 | City |
| Gretna | 2 | 17,272 | 17,767 | -0.51% | 4,279 | 4 | City |
| Harahan | 3 | 8,874 | 9,101 | -0.47% | 4,397 | 2 | City |
| Westwego | 4 | 8,269 | 8,532 | -0.58% | 2,654 | 3 | City |
| Jean Lafitte | 5 | 1,865 | 1,808 | 0.38% | 319 | 6 | Town |
| Grand Isle | 6 | 1,011 | 1,006 | -0.1% | 158 | 6 | Town |
Kenner is the largest city in Jefferson Parish, with a population of 64,911.
Grand Isle is the smallest city in Jefferson Parish, with a population of 1,011.
There are 6 cities in Jefferson Parish, Louisiana.