22 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Batavia | 1 | 15,361 | 15,550 | -0.25% | 2,957 | 5.20 | City |
| Le Roy town | 2 | 7,575 | 7,645 | 0.33% | 180 | 42.09 | Town |
| Batavia town | 3 | 6,296 | 6,303 | 0.33% | 131 | 48.19 | Town |
| Le Roy | 4 | 4,200 | 4,362 | -0.76% | 1,561 | 2.69 | Village |
| Pembroke town | 5 | 4,187 | 4,259 | 0.07% | 101 | 41.63 | Town |
| Oakfield town | 6 | 3,094 | 3,145 | 0.13% | 133 | 23.31 | Town |
| Bergen town | 7 | 3,068 | 3,123 | 0.13% | 111 | 27.56 | Town |
| Darien town | 8 | 2,998 | 3,009 | 0.3% | 63 | 47.39 | Town |
| Alexander town | 9 | 2,452 | 2,476 | 0.45% | 69 | 35.46 | Town |
| Stafford town | 10 | 2,386 | 2,428 | 0.13% | 77 | 31.10 | Town |
| Byron town | 11 | 2,277 | 2,296 | 0.35% | 71 | 32.21 | Town |
| Pavilion town | 12 | 2,246 | 2,287 | 0.13% | 63 | 35.62 | Town |
| Elba town | 13 | 2,148 | 2,155 | 0.47% | 60 | 35.65 | Town |
| Oakfield | 14 | 1,765 | 1,825 | -0.68% | 2,670 | 0.66 | Village |
| Bethany town | 15 | 1,763 | 1,781 | 0.28% | 49 | 36.05 | Town |
| Alabama town | 16 | 1,580 | 1,604 | 0.19% | 37 | 42.37 | Town |
| Bergen | 17 | 1,189 | 1,238 | -0.83% | 1,613 | 0.74 | Village |
| Pavilion | 18 | 732 | 652 | 0.83% | 193 | 3.78 | CDP |
| Corfu | 19 | 682 | 701 | -0.58% | 685 | 0.99 | Village |
| Elba | 20 | 582 | 602 | -0.68% | 572 | 1.02 | Village |
| Alexander | 21 | 487 | 509 | -0.81% | 1,114 | 0.44 | Village |
| Linwood | 22 | 39 | 60 | 8.33% | 42 | 0.93 | CDP |
Batavia is the largest city in Genesee County, with a population of 15,361.
Linwood is the smallest city in Genesee County.
There are 22 cities in Genesee County, New York.