18 cities
| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Vineland | 1 | 63,786 | 60,641 | 1.36% | 933 | 68 | City |
| Vineland | 2 | 62,784 | 60,641 | 0.57% | 918 | 68 | City |
| Bridgeton | 3 | 29,306 | 27,167 | 2.78% | 4,706 | 6 | City |
| Millville | 4 | 28,416 | 27,415 | 1.03% | 677 | 42 | City |
| Millville | 5 | 28,049 | 27,415 | 0.38% | 668 | 42 | City |
| Bridgeton | 6 | 27,999 | 27,167 | 0.5% | 4,496 | 6 | City |
| Upper Deerfield | 7 | 8,160 | 7,622 | 1.13% | 261 | 31 | Township |
| Greenwich | 8 | 5,556 | 5,468 | 0.25% | 525 | 11 | Township |
| Maurice River | 9 | 5,288 | 6,192 | 0.99% | 57 | 93 | Township |
| Greenwich | 10 | 5,101 | 4,917 | 0.67% | 568 | 9 | Township |
| Commercial | 11 | 4,822 | 4,658 | 1.03% | 151 | 32 | Township |
| Deerfield | 12 | 3,308 | 3,128 | 1.41% | 196 | 17 | Township |
| Lawrence | 13 | 3,198 | 3,075 | 1.07% | 87 | 37 | Township |
| Downe | 14 | 1,425 | 1,395 | 0.85% | 29 | 48 | Township |
| Stow Creek | 15 | 1,380 | 1,313 | 1.4% | 76 | 18 | Township |
| Greenwich | 16 | 781 | 766 | 0.51% | 44 | 18 | Township |
| Shiloh | 17 | 461 | 443 | 0.88% | 383 | 1 | Borough |
| Shiloh | 18 | 458 | 443 | 0.66% | 381 | 1 | Borough |
Vineland is the largest city in Cumberland County, with a population of 63,786.
Shiloh is the smallest city in Cumberland County, with a population of 458.
There are 18 cities in Cumberland County, New Jersey.