6 cities
| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Kenner | 1 | 63,830 | 66,290 | -0.64% | 4,287 | 15 | City |
| Gretna | 2 | 16,896 | 17,762 | -0.85% | 4,186 | 4 | City |
| Harahan | 3 | 8,679 | 9,098 | -0.8% | 4,301 | 2 | City |
| Westwego | 4 | 8,076 | 8,541 | -0.94% | 2,592 | 3 | City |
| Jean Lafitte | 5 | 1,818 | 1,809 | 0.11% | 311 | 6 | Town |
| Grand Isle | 6 | 984 | 1,005 | -0.3% | 154 | 6 | Town |
Kenner is the largest city in Jefferson Parish, with a population of 63,830.
Grand Isle is the smallest city in Jefferson Parish, with a population of 984.
There are 6 cities in Jefferson Parish, Louisiana.