| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Attica | 1 | 6,475 | 6,610 | 0% | 181 | 36 | Town |
| Warsaw | 2 | 5,202 | 5,278 | -0.31% | 147 | 35 | Town |
| Perry | 3 | 4,749 | 4,861 | -0.42% | 131 | 36 | Town |
| Arcade | 4 | 4,196 | 4,184 | 0.07% | 89 | 47 | Town |
| Warsaw | 5 | 3,585 | 3,635 | -0.19% | 863 | 4 | Village |
| Perry | 6 | 3,529 | 3,630 | -0.48% | 1,481 | 2 | Village |
| Bennington | 7 | 3,172 | 3,212 | -0.09% | 58 | 55 | Town |
| Castile | 8 | 2,661 | 2,721 | -0.37% | 72 | 37 | Town |
| Attica | 9 | 2,410 | 2,476 | -0.45% | 1,382 | 2 | Village |
| Sheldon | 10 | 2,332 | 2,360 | -0.17% | 49 | 47 | Town |
| Gainesville | 11 | 1,968 | 2,005 | -0.2% | 55 | 36 | Town |
| Java | 12 | 1,932 | 1,969 | -0.51% | 41 | 47 | Town |
| Arcade | 13 | 1,902 | 1,951 | -0.47% | 738 | 3 | Village |
| Middlebury | 14 | 1,313 | 1,337 | -0.15% | 37 | 36 | Town |
| Orangeville | 15 | 1,248 | 1,248 | -0.08% | 35 | 36 | Town |
| Covington | 16 | 1,227 | 1,251 | -0.32% | 47 | 26 | Town |
| Eagle | 17 | 1,089 | 1,103 | 0% | 30 | 36 | Town |
| Castile | 18 | 974 | 997 | -0.41% | 714 | 1 | Village |
| Pike | 19 | 964 | 971 | -0.21% | 31 | 31 | Town |
| Wethersfield | 20 | 743 | 752 | -0.13% | 21 | 36 | Town |
| Silver Springs | 21 | 705 | 722 | -0.42% | 725 | 1 | Village |
| Genesee Falls | 22 | 394 | 402 | -0.51% | 25 | 15 | Town |
| Wyoming | 23 | 373 | 388 | -0.8% | 537 | 1 | Village |
| Gainesville | 24 | 218 | 226 | -0.91% | 256 | 1 | Village |
Attica is the largest city in Wyoming County, with a population of 6,475.
Gainesville is the smallest city in Wyoming County, with a population of 218.
There are 24 cities in Wyoming County, New York.