23 cities
| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Jersey City | 1 | 312,042 | 291,960 | 1.5% | 21,158 | 15 | City |
| Jersey City | 2 | 308,256 | 291,960 | 0.89% | 20,902 | 15 | City |
| Bayonne | 3 | 79,816 | 71,603 | 3.42% | 13,712 | 6 | City |
| Bayonne | 4 | 75,996 | 71,603 | 0.97% | 13,055 | 6 | City |
| Union City | 5 | 68,924 | 68,138 | 1.48% | 53,554 | 1 | City |
| Union City | 6 | 66,308 | 68,138 | -0.46% | 51,521 | 1 | City |
| North Bergen | 7 | 63,552 | 62,913 | 1.5% | 12,386 | 5 | Township |
| Hoboken | 8 | 60,919 | 59,913 | 1.47% | 48,735 | 1 | City |
| Hoboken | 9 | 58,767 | 59,913 | -0.32% | 47,014 | 1 | City |
| West New York | 10 | 55,253 | 52,475 | 2.1% | 55,587 | 1 | Town |
| West New York | 11 | 53,225 | 52,475 | 0.24% | 53,546 | 1 | Town |
| Kearny | 12 | 42,126 | 41,710 | 1.52% | 4,763 | 9 | Town |
| Kearny | 13 | 40,444 | 41,710 | -0.52% | 4,573 | 9 | Town |
| Secaucus | 14 | 25,186 | 22,038 | 5.17% | 4,323 | 6 | Town |
| Harrison | 15 | 24,572 | 19,482 | 5.11% | 20,291 | 1 | Town |
| Harrison | 16 | 23,532 | 19,482 | 2.95% | 19,432 | 1 | Town |
| Secaucus | 17 | 23,046 | 22,038 | 0.73% | 3,956 | 6 | Town |
| Weehawken | 18 | 18,427 | 17,113 | 1.51% | 23,504 | 1 | Township |
| Harrison | 19 | 14,112 | 13,652 | 0.67% | 745 | 19 | Township |
| Guttenberg | 20 | 12,449 | 12,001 | 2.07% | 64,503 | 0 | Town |
| Guttenberg | 21 | 11,917 | 12,001 | -0.12% | 61,746 | 0 | Town |
| East Newark | 22 | 2,649 | 2,563 | 2.12% | 25,718 | 0 | Borough |
| East Newark | 23 | 2,527 | 2,563 | -0.24% | 24,534 | 0 | Borough |
Jersey City is the largest city in Hudson County, with a population of 312,042.
East Newark is the smallest city in Hudson County, with a population of 2,527.
There are 23 cities in Hudson County, New Jersey.