16 cities
| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Paterson | 1 | 164,315 | 159,328 | 1.19% | 19,531 | 8 | City |
| Clifton | 2 | 92,558 | 89,580 | 1.22% | 8,209 | 11 | City |
| Passaic | 3 | 72,492 | 70,318 | 1.24% | 23,138 | 3 | City |
| Wayne | 4 | 55,378 | 54,636 | 1.17% | 2,334 | 24 | Township |
| West Milford | 5 | 25,636 | 24,781 | 1.28% | 337 | 76 | Township |
| Hawthorne | 6 | 20,504 | 19,567 | 1.23% | 6,180 | 3 | Borough |
| Little Falls | 7 | 15,319 | 14,706 | 0.72% | 5,481 | 3 | Township |
| Woodland Park | 8 | 13,803 | 13,416 | 1.2% | 4,695 | 3 | Borough |
| Ringwood | 9 | 12,062 | 11,693 | 1.26% | 471 | 26 | Borough |
| Wanaque | 10 | 11,658 | 11,275 | 1.36% | 1,446 | 8 | Borough |
| Pompton Lakes | 11 | 11,426 | 11,095 | 1.2% | 3,956 | 3 | Borough |
| Totowa | 12 | 11,330 | 11,026 | 1.19% | 2,833 | 4 | Borough |
| Haledon | 13 | 9,283 | 9,023 | 1.2% | 7,640 | 1 | Borough |
| North Haledon | 14 | 9,064 | 8,910 | 1.17% | 2,617 | 3 | Borough |
| Bloomingdale | 15 | 7,987 | 7,757 | 1.22% | 908 | 9 | Borough |
| Prospect Park | 16 | 6,538 | 6,353 | 1.21% | 14,060 | 0 | Borough |
Paterson is the largest city in Passaic County, with a population of 164,315.
Prospect Park is the smallest city in Passaic County, with a population of 6,538.
There are 16 cities in Passaic County, New Jersey.