31 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Monroe | 1 | 38,281 | 37,144 | 0.63% | 825 | 46 | Township |
| Deptford | 2 | 32,781 | 31,998 | 0.65% | 1,891 | 17 | Township |
| Glassboro | 3 | 24,629 | 23,179 | 1.26% | 2,643 | 9 | Borough |
| Glassboro | 4 | 24,607 | 23,179 | 1.17% | 2,640 | 9 | Borough |
| West Deptford | 5 | 22,792 | 22,218 | 0.61% | 1,484 | 15 | Township |
| Mantua | 6 | 15,663 | 15,247 | 0.63% | 979 | 16 | Township |
| Woolwich | 7 | 15,459 | 12,645 | 5.46% | 734 | 21 | Township |
| East Greenwich | 8 | 12,719 | 11,760 | 1.23% | 881 | 14 | Township |
| Woodbury | 9 | 10,202 | 9,962 | 0.63% | 5,050 | 2 | City |
| Woodbury | 10 | 10,182 | 9,962 | 0.43% | 5,041 | 2 | City |
| Clayton | 11 | 9,076 | 8,806 | 0.67% | 1,283 | 7 | Borough |
| Clayton | 12 | 9,068 | 8,806 | 0.58% | 1,282 | 7 | Borough |
| Pitman | 13 | 8,998 | 8,784 | 0.62% | 4,057 | 2 | Borough |
| Pitman | 14 | 8,982 | 8,784 | 0.44% | 4,050 | 2 | Borough |
| Paulsboro | 15 | 6,356 | 6,194 | 0.63% | 3,304 | 2 | Borough |
| Paulsboro | 16 | 6,346 | 6,194 | 0.47% | 3,298 | 2 | Borough |
| Logan | 17 | 6,154 | 5,998 | 0.62% | 281 | 22 | Township |
| Elk | 18 | 4,536 | 4,415 | 0.67% | 237 | 19 | Township |
| Westville | 19 | 4,377 | 4,266 | 0.62% | 4,274 | 1 | Borough |
| Westville | 20 | 4,371 | 4,266 | 0.48% | 4,269 | 1 | Borough |
| South Harrison | 21 | 3,494 | 3,399 | 0.63% | 220 | 16 | Township |
| Woodbury Heights | 22 | 3,180 | 3,100 | 0.79% | 2,552 | 1 | Borough |
| Woodbury Heights | 23 | 3,168 | 3,100 | 0.41% | 2,543 | 1 | Borough |
| National Park | 24 | 3,104 | 3,031 | 0.62% | 3,079 | 1 | Borough |
| National Park | 25 | 3,098 | 3,031 | 0.42% | 3,073 | 1 | Borough |
| Swedesboro | 26 | 2,789 | 2,709 | 0.83% | 3,815 | 1 | Borough |
| Swedesboro | 27 | 2,780 | 2,709 | 0.51% | 3,803 | 1 | Borough |
| Wenonah | 28 | 2,342 | 2,283 | 0.6% | 2,351 | 1 | Borough |
| Wenonah | 29 | 2,339 | 2,283 | 0.47% | 2,348 | 1 | Borough |
| Newfield | 30 | 1,823 | 1,777 | 0.61% | 1,049 | 2 | Borough |
| Newfield | 31 | 1,820 | 1,777 | 0.44% | 1,047 | 2 | Borough |
Monroe is the largest city in Gloucester County, with a population of 38,281.
Newfield is the smallest city in Gloucester County, with a population of 1,820.
There are 31 cities in Gloucester County, New Jersey.