18 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Vineland | 1 | 62,928 | 60,641 | 1.38% | 920 | 68 | City |
| Vineland | 2 | 62,427 | 60,641 | 0.58% | 913 | 68 | City |
| Bridgeton | 3 | 28,514 | 27,167 | 2.86% | 4,578 | 6 | City |
| Millville | 4 | 28,127 | 27,415 | 1.04% | 670 | 42 | City |
| Millville | 5 | 27,943 | 27,415 | 0.38% | 665 | 42 | City |
| Bridgeton | 6 | 27,860 | 27,167 | 0.5% | 4,473 | 6 | City |
| Upper Deerfield | 7 | 8,069 | 7,622 | 1.14% | 258 | 31 | Township |
| Greenwich | 8 | 5,542 | 5,468 | 0.25% | 524 | 11 | Township |
| Maurice River | 9 | 5,236 | 6,192 | 1% | 56 | 93 | Township |
| Greenwich | 10 | 5,067 | 4,917 | 0.68% | 564 | 9 | Township |
| Commercial | 11 | 4,773 | 4,658 | 1.04% | 150 | 32 | Township |
| Deerfield | 12 | 3,262 | 3,128 | 1.43% | 194 | 17 | Township |
| Lawrence | 13 | 3,164 | 3,075 | 1.09% | 86 | 37 | Township |
| Downe | 14 | 1,413 | 1,395 | 0.86% | 29 | 48 | Township |
| Stow Creek | 15 | 1,361 | 1,313 | 1.42% | 75 | 18 | Township |
| Greenwich | 16 | 777 | 766 | 0.52% | 44 | 18 | Township |
| Shiloh | 17 | 457 | 443 | 0.88% | 380 | 1 | Borough |
| Shiloh | 18 | 455 | 443 | 0.44% | 378 | 1 | Borough |
Vineland is the largest city in Cumberland County, with a population of 62,928.
Shiloh is the smallest city in Cumberland County, with a population of 455.
There are 18 cities in Cumberland County, New Jersey.