30 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| North Elba town | 1 | 7,740 | 7,478 | 0.91% | 51 | 151.69 | Town |
| Ticonderoga town | 2 | 4,605 | 4,789 | -0.67% | 57 | 81.43 | Town |
| Moriah town | 3 | 4,337 | 4,641 | -0.64% | 67 | 64.49 | Town |
| Ticonderoga | 4 | 3,403 | 3,466 | 0.03% | 797 | 4.27 | CDP |
| Jay town | 5 | 2,506 | 2,484 | 0.44% | 37 | 67.66 | Town |
| Chesterfield town | 6 | 2,444 | 2,472 | 0.04% | 31 | 79.03 | Town |
| Lake Placid | 7 | 2,277 | 2,272 | 0.04% | 1,673 | 1.36 | Village |
| Port Henry | 8 | 2,002 | 1,859 | 7.12% | 1,439 | 1.39 | CDP |
| Crown Point town | 9 | 1,980 | 2,039 | -0.3% | 26 | 76.12 | Town |
| Schroon town | 10 | 1,843 | 1,878 | -0.16% | 14 | 132.68 | Town |
| Willsboro town | 11 | 1,835 | 1,903 | -0.38% | 43 | 42.71 | Town |
| St. Armand town | 12 | 1,407 | 1,440 | -0.21% | 25 | 56.51 | Town |
| Westport town | 13 | 1,289 | 1,322 | -0.15% | 22 | 58.17 | Town |
| Lewis town | 14 | 1,265 | 1,291 | -0.47% | 15 | 84.79 | Town |
| Mineville | 15 | 1,240 | 1,227 | -0.16% | 335 | 3.70 | CDP |
| Wilmington town | 16 | 1,201 | 1,143 | 1.35% | 18 | 65.22 | Town |
| Elizabethtown town | 17 | 1,190 | 1,203 | -0.08% | 15 | 81.63 | Town |
| Keene town | 18 | 1,122 | 1,137 | -0.09% | 7 | 155.94 | Town |
| Schroon Lake | 19 | 949 | 888 | 0.74% | 329 | 2.89 | CDP |
| Wilmington | 20 | 930 | 772 | 0% | 113 | 8.24 | CDP |
| Lewis town | 21 | 834 | 840 | 0% | 13 | 64.40 | Town |
| Willsboro Point | 22 | 754 | 578 | 7.1% | 271 | 2.78 | CDP |
| Willsboro | 23 | 753 | 605 | 0% | 394 | 1.91 | CDP |
| Minerva town | 24 | 743 | 768 | -0.4% | 5 | 156.74 | Town |
| Essex town | 25 | 620 | 618 | 0.32% | 20 | 31.63 | Town |
| Elizabethtown | 26 | 503 | 581 | -3.27% | 152 | 3.31 | CDP |
| Newcomb town | 27 | 422 | 418 | 0.72% | 2 | 226.19 | Town |
| North Hudson town | 28 | 250 | 251 | 0% | 1 | 181.45 | Town |
| Westport | 29 | 184 | 302 | -10.68% | 78 | 2.36 | CDP |
| Witherbee | 30 | 171 | 207 | -6.04% | 175 | 0.98 | CDP |
North Elba town is the largest city in Essex County, with a population of 7,740.
Witherbee is the smallest city in Essex County.
There are 30 cities in Essex County, New York.