| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| North Elba | 1 | 7,914 | 7,477 | 1.88% | 52 | 152 | Town |
| Ticonderoga | 2 | 4,493 | 4,789 | -1.23% | 55 | 81 | Town |
| Moriah | 3 | 4,228 | 4,644 | -1.38% | 66 | 64 | Town |
| Jay | 4 | 2,463 | 2,484 | -0.36% | 36 | 68 | Town |
| Chesterfield | 5 | 2,379 | 2,473 | -0.96% | 30 | 79 | Town |
| Lake Placid | 6 | 2,262 | 2,266 | 0.18% | 1,662 | 1 | Village |
| Crown Point | 7 | 1,925 | 2,038 | -1.03% | 25 | 76 | Town |
| Willsboro | 8 | 1,827 | 1,903 | -0.22% | 43 | 43 | Town |
| Schroon | 9 | 1,799 | 1,879 | -1.05% | 14 | 133 | Town |
| St. Armand | 10 | 1,359 | 1,441 | -1.31% | 24 | 57 | Town |
| Westport | 11 | 1,264 | 1,318 | -0.63% | 22 | 58 | Town |
| Lewis | 12 | 1,229 | 1,289 | -0.81% | 14 | 85 | Town |
| Wilmington | 13 | 1,191 | 1,141 | 0.76% | 18 | 65 | Town |
| Elizabethtown | 14 | 1,174 | 1,202 | -0.51% | 14 | 82 | Town |
| Keene | 15 | 1,123 | 1,139 | 0.18% | 7.0 | 156 | Town |
| Lewis | 16 | 832 | 841 | -0.24% | 13 | 64 | Town |
| Minerva | 17 | 725 | 767 | -1.36% | 5.0 | 157 | Town |
| Essex | 18 | 590 | 617 | -1.5% | 19 | 32 | Town |
| Newcomb | 19 | 412 | 424 | -0.96% | 2.0 | 226 | Town |
| North Hudson | 20 | 242 | 250 | -1.22% | 1.0 | 181 | Town |
North Elba is the largest city in Essex County, with a population of 7,914.
North Hudson is the smallest city in Essex County, with a population of 242.
There are 20 cities in Essex County, New York.