Note: As defined by the US Census Bureau, a city's official boundaries often extend miles beyond the city itself and may even cross county lines. As such, several thousand US cities officially exist in two or more counties (and therefore appear on multiple counties' lists of cities.)
City | Rank | 2024 Pop. | 2020 Pop. | Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Monroe township | 1 | 37,778 | 37,142 | 0.07% | 814 | 46.4 | Township |
| Deptford township | 2 | 32,352 | 31,996 | 0.12% | 1,867 | 17.3 | Township |
| Glassboro borough | 3 | 24,342 | 23,176 | 1.48% | 2,612 | 9.3 | Borough |
| West Deptford township | 4 | 22,541 | 22,206 | 0.31% | 1,468 | 15.4 | Township |
| Mantua township | 5 | 15,497 | 15,246 | 0.33% | 968 | 16.0 | Township |
| Woolwich township | 6 | 14,272 | 12,645 | 3.13% | 677 | 21.1 | Township |
| East Greenwich township | 7 | 12,576 | 11,760 | 1.47% | 871 | 14.4 | Township |
| Woodbury | 8 | 10,097 | 9,963 | 0.34% | 4,999 | 2.0 | City |
| Clayton borough | 9 | 8,977 | 8,809 | 0.32% | 1,269 | 7.1 | Borough |
| Pitman borough | 10 | 8,898 | 8,788 | 0.2% | 4,012 | 2.2 | Borough |
| Paulsboro borough | 11 | 6,288 | 6,193 | 0.34% | 3,268 | 1.9 | Borough |
| Logan township | 12 | 6,091 | 5,998 | 0.35% | 278 | 21.9 | Township |
| Elk township | 13 | 4,493 | 4,418 | 0.45% | 235 | 19.2 | Township |
| Westville borough | 14 | 4,331 | 4,266 | 0.32% | 4,229 | 1.0 | Borough |
| South Harrison township | 15 | 3,455 | 3,398 | 0.32% | 217 | 15.9 | Township |
| Woodbury Heights borough | 16 | 3,141 | 3,100 | 0.45% | 2,521 | 1.2 | Borough |
| National Park borough | 17 | 3,068 | 3,031 | 0.16% | 3,044 | 1.0 | Borough |
| Swedesboro borough | 18 | 2,750 | 2,711 | 0.33% | 3,762 | 0.7 | Borough |
| Wenonah borough | 19 | 2,316 | 2,282 | 0.3% | 2,325 | 1.0 | Borough |
| Newfield borough | 20 | 1,804 | 1,777 | 0.33% | 1,038 | 1.7 | Borough |
Note: City markers shown outside the county boundary mean that a part of the city extends into this county, but is primarily located in an adjacent county.
Monroe township is the largest city in Gloucester County.
Newfield borough is the smallest city in Gloucester County.
There are 20 cities in Gloucester County, New Jersey.