20 cities
| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Monroe | 1 | 38,519 | 37,144 | 0.62% | 830 | 46 | Township |
| Deptford | 2 | 32,992 | 31,998 | 0.64% | 1,904 | 17 | Township |
| Glassboro | 3 | 24,936 | 23,179 | 1.25% | 2,676 | 9 | Borough |
| West Deptford | 4 | 22,931 | 22,218 | 0.61% | 1,493 | 15 | Township |
| Woolwich | 5 | 16,260 | 12,645 | 5.18% | 772 | 21 | Township |
| Mantua | 6 | 15,761 | 15,247 | 0.63% | 985 | 16 | Township |
| East Greenwich | 7 | 12,873 | 11,760 | 1.21% | 891 | 14 | Township |
| Woodbury | 8 | 10,266 | 9,962 | 0.63% | 5,082 | 2 | City |
| Clayton | 9 | 9,136 | 8,806 | 0.66% | 1,291 | 7 | Borough |
| Pitman | 10 | 9,053 | 8,784 | 0.61% | 4,082 | 2 | Borough |
| Paulsboro | 11 | 6,396 | 6,194 | 0.63% | 3,324 | 2 | Borough |
| Logan | 12 | 6,192 | 5,998 | 0.62% | 282 | 22 | Township |
| Elk | 13 | 4,566 | 4,415 | 0.66% | 238 | 19 | Township |
| Westville | 14 | 4,404 | 4,266 | 0.62% | 4,301 | 1 | Borough |
| South Harrison | 15 | 3,516 | 3,399 | 0.63% | 221 | 16 | Township |
| Woodbury Heights | 16 | 3,205 | 3,100 | 0.79% | 2,572 | 1 | Borough |
| National Park | 17 | 3,123 | 3,031 | 0.61% | 3,098 | 1 | Borough |
| Swedesboro | 18 | 2,812 | 2,709 | 0.82% | 3,847 | 1 | Borough |
| Wenonah | 19 | 2,356 | 2,283 | 0.6% | 2,365 | 1 | Borough |
| Newfield | 20 | 1,834 | 1,777 | 0.6% | 1,055 | 2 | Borough |
Monroe is the largest city in Gloucester County, with a population of 38,519.
Newfield is the smallest city in Gloucester County, with a population of 1,834.
There are 20 cities in Gloucester County, New Jersey.