22 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| New Orleans | 1 | 351,399 | 383,241 | -1.78% | 2,073 | 169.50 | City |
| Metairie | 2 | 140,437 | 138,511 | 0.09% | 6,064 | 23.16 | CDP |
| Kenner | 3 | 61,359 | 66,293 | -1.58% | 4,121 | 14.89 | City |
| Marrero | 4 | 31,719 | 31,751 | -0.3% | 4,405 | 7.20 | CDP |
| Terrytown | 5 | 26,802 | 26,044 | 0.88% | 7,315 | 3.66 | CDP |
| Harvey | 6 | 21,769 | 20,992 | 0.44% | 3,356 | 6.49 | CDP |
| Estelle | 7 | 17,270 | 17,330 | 0.35% | 3,724 | 4.64 | CDP |
| Gretna | 8 | 16,535 | 17,762 | -1.46% | 4,097 | 4.04 | City |
| River Ridge | 9 | 13,329 | 13,690 | -0.08% | 4,767 | 2.80 | CDP |
| Woodmere | 10 | 11,556 | 10,908 | -0.3% | 3,164 | 3.65 | CDP |
| Timberlane | 11 | 11,079 | 10,498 | 0.5% | 7,366 | 1.50 | CDP |
| Waggaman | 12 | 10,879 | 10,917 | 0.54% | 1,898 | 5.73 | CDP |
| Jefferson | 13 | 9,878 | 10,286 | -0.88% | 3,649 | 2.71 | CDP |
| Harahan | 14 | 8,466 | 9,098 | -1.47% | 4,195 | 2.02 | City |
| Westwego | 15 | 7,886 | 8,540 | -1.63% | 2,531 | 3.12 | City |
| Bridge City | 16 | 6,719 | 6,409 | -0.96% | 1,607 | 4.18 | CDP |
| Elmwood | 17 | 6,442 | 6,099 | 1.9% | 1,707 | 3.77 | CDP |
| Avondale | 18 | 4,849 | 4,889 | -0.14% | 873 | 5.56 | CDP |
| Jean Lafitte | 19 | 1,761 | 1,810 | -0.56% | 301 | 5.85 | Town |
| Grand Isle | 20 | 938 | 1,007 | -1.47% | 146 | 6.40 | Town |
| Barataria | 21 | 688 | 1,027 | -3.91% | 161 | 4.29 | CDP |
| Lafitte | 22 | 454 | 850 | -7.16% | 94 | 4.84 | CDP |
New Orleans is the largest city in Jefferson Parish, with a population of 351,399.
Lafitte is the smallest city in Jefferson Parish.
There are 22 cities in Jefferson Parish, Louisiana.