23 cities
| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Newark | 1 | 333,459 | 310,665 | 2.48% | 13,811 | 24 | City |
| East Orange | 2 | 74,070 | 69,419 | 1.52% | 18,857 | 4 | City |
| Irvington | 3 | 63,708 | 60,900 | 1.49% | 21,863 | 3 | Township |
| Bloomfield | 4 | 57,082 | 52,864 | 1.48% | 10,696 | 5 | Township |
| West Orange | 5 | 50,513 | 48,693 | 1.31% | 4,208 | 12 | Township |
| Montclair | 6 | 42,280 | 39,849 | 1.44% | 6,778 | 6 | Township |
| Belleville | 7 | 39,848 | 38,076 | 1.5% | 12,090 | 3 | Township |
| City of Orange | 8 | 36,631 | 34,263 | 2.16% | 16,553 | 2 | Township |
| Livingston | 9 | 33,230 | 31,263 | 1.64% | 2,411 | 14 | Township |
| Nutley | 10 | 31,460 | 30,038 | 1.54% | 9,330 | 3 | Township |
| Maplewood | 11 | 26,921 | 25,568 | 1.5% | 6,949 | 4 | Township |
| Millburn | 12 | 23,812 | 21,635 | 2.27% | 2,551 | 9 | Township |
| South Orange Village | 13 | 19,236 | 18,438 | 1.32% | 6,759 | 3 | Township |
| Verona | 14 | 15,235 | 14,562 | 1.52% | 5,453 | 3 | Township |
| Cedar Grove | 15 | 14,180 | 13,081 | 1.48% | 3,347 | 4 | Township |
| West Caldwell | 16 | 11,477 | 10,995 | 1.41% | 2,252 | 5 | Township |
| Caldwell | 17 | 10,076 | 8,973 | 3.87% | 8,553 | 1 | Borough |
| Fairfield | 18 | 8,454 | 7,841 | 1.5% | 835 | 10 | Township |
| Glen Ridge | 19 | 8,452 | 7,753 | 1.49% | 6,629 | 1 | Borough |
| North Caldwell | 20 | 6,975 | 6,653 | 1.5% | 2,273 | 3 | Borough |
| Roseland | 21 | 6,564 | 6,272 | 1.5% | 1,814 | 4 | Borough |
| Fairfield | 22 | 5,437 | 5,532 | 0.39% | 132 | 41 | Township |
| Essex Fells | 23 | 2,298 | 2,219 | 1.73% | 1,632 | 1 | Borough |
Newark is the largest city in Essex County, with a population of 333,459.
Essex Fells is the smallest city in Essex County, with a population of 2,298.
There are 23 cities in Essex County, New Jersey.