55 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Victor | 1 | 16,248 | 15,857 | 0.55% | 452 | 36 | Town |
| Victor | 2 | 16,248 | 15,869 | 0.55% | 452 | 36 | Town |
| Farmington | 3 | 15,287 | 14,175 | 1.66% | 388 | 39 | Town |
| Farmington | 4 | 15,287 | 14,204 | 1.66% | 388 | 39 | Town |
| Geneva | 5 | 12,320 | 12,826 | -0.62% | 2,924 | 4 | City |
| Geneva | 6 | 12,320 | 12,703 | -0.62% | 2,924 | 4 | City |
| Canandaigua | 7 | 11,585 | 11,121 | 0.93% | 204 | 57 | Town |
| Canandaigua | 8 | 11,585 | 11,134 | 0.93% | 204 | 57 | Town |
| Canandaigua | 9 | 10,462 | 10,565 | -0.13% | 2,294 | 5 | City |
| Canandaigua | 10 | 10,462 | 10,532 | -0.13% | 2,294 | 5 | City |
| Manchester | 11 | 9,236 | 9,412 | -0.15% | 244 | 38 | Town |
| Manchester | 12 | 9,236 | 9,401 | -0.15% | 244 | 38 | Town |
| Phelps | 13 | 6,596 | 6,639 | 0.11% | 102 | 65 | Town |
| Phelps | 14 | 6,596 | 6,640 | 0.11% | 102 | 65 | Town |
| Gorham | 15 | 4,096 | 4,104 | 0.22% | 84 | 49 | Town |
| Gorham | 16 | 4,096 | 4,102 | 0.22% | 84 | 49 | Town |
| Hopewell | 17 | 3,898 | 3,929 | 0.21% | 109 | 36 | Town |
| Hopewell | 18 | 3,898 | 3,924 | 0.21% | 109 | 36 | Town |
| East Bloomfield | 19 | 3,641 | 3,641 | 0.25% | 110 | 33 | Town |
| East Bloomfield | 20 | 3,641 | 3,645 | 0.25% | 110 | 33 | Town |
| Geneva | 21 | 3,484 | 3,470 | 0.29% | 181 | 19 | Town |
| Geneva | 22 | 3,484 | 3,471 | 0.29% | 181 | 19 | Town |
| Richmond | 23 | 3,295 | 3,354 | -0.21% | 78 | 42 | Town |
| Richmond | 24 | 3,295 | 3,353 | -0.21% | 78 | 42 | Town |
| West Bloomfield | 25 | 2,738 | 2,750 | 0.29% | 108 | 25 | Town |
| West Bloomfield | 26 | 2,738 | 2,747 | 0.29% | 108 | 25 | Town |
| Victor | 27 | 2,655 | 2,731 | -0.56% | 1,944 | 1 | Village |
| Victor | 28 | 2,655 | 2,729 | -0.56% | 1,944 | 1 | Village |
| Seneca | 29 | 2,629 | 2,641 | 0.46% | 52 | 50 | Town |
| Seneca | 30 | 2,629 | 2,641 | 0.46% | 52 | 50 | Town |
| Naples | 31 | 2,368 | 2,400 | -0.17% | 60 | 40 | Town |
| Naples | 32 | 2,368 | 2,400 | -0.17% | 60 | 40 | Town |
| Bristol | 33 | 2,264 | 2,281 | 0.31% | 62 | 37 | Town |
| Bristol | 34 | 2,264 | 2,283 | 0.31% | 62 | 37 | Town |
| Clifton Springs | 35 | 2,159 | 2,214 | -0.42% | 1,457 | 1 | Village |
| Clifton Springs | 36 | 2,159 | 2,203 | -0.42% | 1,457 | 1 | Village |
| Phelps | 37 | 1,863 | 1,871 | -0.11% | 1,610 | 1 | Village |
| Phelps | 38 | 1,863 | 1,871 | -0.11% | 1,610 | 1 | Village |
| Canadice | 39 | 1,641 | 1,661 | 0% | 55 | 30 | Town |
| Canadice | 40 | 1,641 | 1,659 | 0% | 55 | 30 | Town |
| South Bristol | 41 | 1,626 | 1,639 | 0.18% | 42 | 39 | Town |
| South Bristol | 42 | 1,626 | 1,642 | 0.18% | 42 | 39 | Town |
| Manchester | 43 | 1,622 | 1,663 | -0.49% | 1,422 | 1 | Village |
| Manchester | 44 | 1,622 | 1,661 | -0.49% | 1,422 | 1 | Village |
| Shortsville | 45 | 1,348 | 1,391 | -0.66% | 2,136 | 1 | Village |
| Shortsville | 46 | 1,348 | 1,390 | -0.66% | 2,136 | 1 | Village |
| Bloomfield | 47 | 1,328 | 1,359 | -0.52% | 952 | 1 | Village |
| Bloomfield | 48 | 1,328 | 1,360 | -0.52% | 952 | 1 | Village |
| Naples | 49 | 948 | 979 | -0.63% | 981 | 1 | Village |
| Naples | 50 | 948 | 978 | -0.63% | 981 | 1 | Village |
| Honeoye | 51 | 815 | 671 | 1.88% | 655 | 1 | CDP |
| Crystal Beach | 52 | 772 | 693 | 1.18% | 1,132 | 1 | CDP |
| Port Gibson | 53 | 607 | 859 | 1.85% | 490 | 1 | CDP |
| Gorham | 54 | 438 | 762 | -2.67% | 218 | 2 | CDP |
| Hall | 55 | 324 | 314 | 2.53% | 317 | 1 | CDP |
Victor is the largest city in Ontario County, with a population of 16,248.
Hall is the smallest city in Ontario County, with a population of 324.
There are 55 cities in Ontario County, New York.