27 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Attica | 1 | 6,309 | 6,502 | 2.5% | 176 | 36 | Town |
| Warsaw | 2 | 5,239 | 5,291 | -0.38% | 148 | 35 | Town |
| Perry | 3 | 4,783 | 4,861 | -0.25% | 131 | 36 | Town |
| Arcade | 4 | 4,184 | 4,179 | -0.29% | 89 | 47 | Town |
| Warsaw | 5 | 3,607 | 3,640 | -0.19% | 869 | 4 | Village |
| Perry | 6 | 3,571 | 3,638 | -0.39% | 1,499 | 2 | Village |
| Bennington | 7 | 3,193 | 3,227 | -0.25% | 58 | 55 | Town |
| Castile | 8 | 2,689 | 2,722 | -0.26% | 72 | 37 | Town |
| Attica | 9 | 2,432 | 2,480 | -0.41% | 1,394 | 2 | Village |
| Sheldon | 10 | 2,328 | 2,359 | -0.34% | 49 | 47 | Town |
| Gainesville | 11 | 1,979 | 2,005 | -0.3% | 56 | 36 | Town |
| Java | 12 | 1,939 | 1,963 | -0.26% | 41 | 47 | Town |
| Arcade | 13 | 1,912 | 1,949 | -0.42% | 742 | 3 | Village |
| Middlebury | 14 | 1,311 | 1,334 | -0.38% | 37 | 36 | Town |
| Orangeville | 15 | 1,264 | 1,279 | -0.32% | 36 | 36 | Town |
| Covington | 16 | 1,237 | 1,251 | -0.24% | 47 | 26 | Town |
| Eagle | 17 | 1,087 | 1,101 | -0.28% | 30 | 36 | Town |
| Castile | 18 | 983 | 998 | -0.3% | 721 | 1 | Village |
| Pike | 19 | 964 | 976 | -0.21% | 31 | 31 | Town |
| Wethersfield | 20 | 741 | 750 | -0.27% | 21 | 36 | Town |
| Silver Springs | 21 | 715 | 724 | -0.28% | 736 | 1 | Village |
| Strykersville | 22 | 492 | 599 | -1.99% | 112 | 4 | CDP |
| Bliss | 23 | 425 | 415 | -1.39% | 43 | 10 | CDP |
| Genesee Falls | 24 | 399 | 401 | 0.25% | 26 | 15 | Town |
| Wyoming | 25 | 374 | 383 | -0.53% | 538 | 1 | Village |
| Pike | 26 | 223 | 296 | -4.29% | 128 | 2 | CDP |
| Gainesville | 27 | 220 | 225 | -0.45% | 258 | 1 | Village |
Attica is the largest city in Wyoming County, with a population of 6,309.
Gainesville is the smallest city in Wyoming County, with a population of 220.
There are 27 cities in Wyoming County, New York.