There are 21 cities in Lewis County, New York.
Note: As defined by the US Census Bureau, a city's official boundaries often extend miles beyond the city itself and may even cross county lines. As such, several thousand US cities officially exist in two or more counties (and therefore appear on multiple counties' lists of cities.)
City | Rank | State | 2024 Population | 2020 Census | Annual Change | Density (mi²) | Area (mi²) |
|---|---|---|---|---|---|---|---|
| Watertown | 1 | New York | 24,027 | 24,546 | -0.54% | 2,660 | 9.03 |
| Lowville | 2 | New York | 3,323 | 3,337 | -0.12% | 1,752 | 1.90 |
| Carthage | 3 | New York | 3,247 | 3,315 | -0.52% | 1,339 | 2.42 |
| Camden | 4 | New York | 2,124 | 2,198 | -0.89% | 872 | 2.44 |
| Boonville | 5 | New York | 1,998 | 2,032 | -0.45% | 1,156 | 1.73 |
| West Carthage | 6 | New York | 1,749 | 1,767 | -0.29% | 1,337 | 1.31 |
| Black River | 7 | New York | 1,229 | 1,260 | -0.65% | 690 | 1.78 |
| Great Bend | 8 | New York | 1,087 | 1,329 | -5.23% | 188 | 5.79 |
| Pamelia Center | 9 | New York | 742 | 441 | -1.85% | 530 | 1.40 |
| Copenhagen | 10 | New York | 660 | 663 | -0.15% | 559 | 1.18 |
| Croghan | 11 | New York | 637 | 640 | -0.16% | 1,492 | 0.43 |
| Port Leyden | 12 | New York | 594 | 594 | 0% | 892 | 0.67 |
| Lyons Falls | 13 | New York | 593 | 596 | -0.17% | 612 | 0.97 |
| Glen Park | 14 | New York | 444 | 446 | -0.22% | 622 | 0.71 |
| Castorland | 15 | New York | 337 | 339 | -0.3% | 1,000 | 0.34 |
| Constableville | 16 | New York | 302 | 300 | 0% | 267 | 1.13 |
| Deferiet | 17 | New York | 254 | 258 | -0.39% | 376 | 0.68 |
| Rodman | 18 | New York | 233 | 142 | 9.39% | 1,465 | 0.16 |
| Turin | 19 | New York | 212 | 214 | -0.47% | 205 | 1.03 |
| Natural Bridge | 20 | New York | 130 | 228 | -15.58% | 101 | 1.28 |
| Herrings | 21 | New York | 0 | 132 | 0% | 0 | 0.15 |
Note: City markers shown outside the county boundary mean that a part of the city extends into this county, but is primarily located in an adjacent county.
Watertown is the largest city in Lewis County.
Herrings is the smallest city in Lewis County.
There are 21 cities in Lewis County, New York.