12 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Vineland | 1 | 61,455 | 60,644 | 0.54% | 898 | 68.40 | City |
| Bridgeton | 2 | 27,475 | 27,160 | 1.31% | 4,412 | 6.23 | City |
| Millville | 3 | 27,472 | 27,413 | 0.21% | 654 | 42 | City |
| Upper Deerfield township | 4 | 7,904 | 7,622 | 0.47% | 253 | 31.24 | Township |
| Greenwich township | 5 | 5,521 | 5,467 | 0.16% | 522 | 10.58 | Township |
| Maurice River township | 6 | 5,383 | 6,196 | 2.53% | 58 | 93.17 | Township |
| Greenwich township | 7 | 5,035 | 4,918 | 0.42% | 560 | 8.99 | Township |
| Commercial township | 8 | 4,665 | 4,658 | 0.24% | 146 | 31.91 | Township |
| Deerfield township | 9 | 3,179 | 3,126 | 0.51% | 189 | 16.84 | Township |
| Lawrence township | 10 | 3,087 | 3,074 | 0.23% | 84 | 36.92 | Township |
| Downe township | 11 | 1,378 | 1,397 | -0.14% | 28 | 48.40 | Township |
| Stow Creek township | 12 | 1,327 | 1,316 | 0.38% | 73 | 18.27 | Township |
Vineland is the largest city in Cumberland County, with a population of 61,455.
Stow Creek township is the smallest city in Cumberland County.
There are 12 cities in Cumberland County, New Jersey.