30 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| North Elba | 1 | 7,723 | 7,478 | 0.82% | 51 | 152 | Town |
| Ticonderoga | 2 | 4,587 | 4,790 | -0.91% | 56 | 81 | Town |
| Moriah | 3 | 4,332 | 4,639 | -0.73% | 67 | 64 | Town |
| Ticonderoga | 4 | 3,403 | 3,466 | 0.03% | 797 | 4 | CDP |
| Jay | 5 | 2,502 | 2,485 | 0.36% | 37 | 68 | Town |
| Chesterfield | 6 | 2,440 | 2,471 | 0% | 31 | 79 | Town |
| Lake Placid | 7 | 2,310 | 2,270 | 0.35% | 1,697 | 1 | Village |
| Port Henry | 8 | 2,002 | 1,859 | 7.12% | 1,439 | 1 | CDP |
| Crown Point | 9 | 1,972 | 2,041 | -0.5% | 26 | 76 | Town |
| Schroon | 10 | 1,842 | 1,879 | -0.27% | 14 | 133 | Town |
| Willsboro | 11 | 1,835 | 1,903 | -0.43% | 43 | 43 | Town |
| St. Armand | 12 | 1,397 | 1,441 | -0.57% | 25 | 57 | Town |
| Westport | 13 | 1,288 | 1,324 | -0.31% | 22 | 58 | Town |
| Mineville | 14 | 1,240 | 1,227 | -0.16% | 335 | 4 | CDP |
| Lewis | 15 | 1,233 | 1,292 | -1.91% | 15 | 85 | Town |
| Elizabethtown | 16 | 1,193 | 1,202 | 0.08% | 15 | 82 | Town |
| Wilmington | 17 | 1,191 | 1,141 | 1.1% | 18 | 65 | Town |
| Keene | 18 | 1,129 | 1,140 | 0.09% | 7 | 156 | Town |
| Schroon Lake | 19 | 949 | 888 | 0.74% | 329 | 3 | CDP |
| Wilmington | 20 | 930 | 772 | 0% | 113 | 8 | CDP |
| Lewis | 21 | 834 | 840 | -0.12% | 13 | 64 | Town |
| Willsboro Point | 22 | 754 | 578 | 7.1% | 271 | 3 | CDP |
| Willsboro | 23 | 753 | 605 | 0% | 394 | 2 | CDP |
| Minerva | 24 | 751 | 768 | 0.13% | 5 | 157 | Town |
| Essex | 25 | 607 | 618 | -0.82% | 19 | 32 | Town |
| Elizabethtown | 26 | 503 | 581 | -3.27% | 152 | 3 | CDP |
| Newcomb | 27 | 422 | 425 | -0.24% | 2 | 226 | Town |
| North Hudson | 28 | 248 | 251 | -0.4% | 1 | 181 | Town |
| Westport | 29 | 184 | 302 | -10.68% | 78 | 2 | CDP |
| Witherbee | 30 | 171 | 207 | -6.04% | 175 | 1 | CDP |
North Elba is the largest city in Essex County, with a population of 7,723.
Witherbee is the smallest city in Essex County, with a population of 171.
There are 30 cities in Essex County, New York.