34 cities
| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Auburn | 1 | 25,511 | 26,866 | -0.88% | 3,061 | 8 | City |
| Aurora | 2 | 13,994 | 13,843 | 0.33% | 385 | 36 | Town |
| Brutus | 3 | 4,181 | 4,308 | -0.43% | 189 | 22 | Town |
| Moravia | 4 | 3,499 | 3,224 | 4.39% | 121 | 29 | Town |
| Owasco | 5 | 3,443 | 3,552 | -0.38% | 165 | 21 | Town |
| Sennett | 6 | 3,172 | 3,306 | -1% | 110 | 29 | Town |
| Sterling | 7 | 3,134 | 3,220 | -0.35% | 69 | 45 | Town |
| Aurelius | 8 | 2,778 | 2,595 | 2.97% | 92 | 30 | Town |
| Cato | 9 | 2,394 | 2,441 | -0.13% | 71 | 34 | Town |
| Fleming | 10 | 2,383 | 2,470 | -0.5% | 109 | 22 | Town |
| Mentz | 11 | 2,181 | 2,106 | -0.55% | 129 | 17 | Town |
| Springport | 12 | 2,139 | 2,227 | -0.51% | 100 | 21 | Town |
| Ira | 13 | 2,074 | 2,141 | -0.38% | 60 | 35 | Town |
| Locke | 14 | 1,872 | 1,877 | -0.21% | 77 | 24 | Town |
| Throop | 15 | 1,782 | 1,828 | -0.39% | 96 | 19 | Town |
| Genoa | 16 | 1,774 | 1,818 | -0.28% | 45 | 40 | Town |
| Weedsport | 17 | 1,737 | 1,808 | -0.69% | 1,780 | 1 | Village |
| Conquest | 18 | 1,717 | 1,790 | -0.69% | 49 | 35 | Town |
| Victory | 19 | 1,657 | 1,652 | 0.36% | 48 | 34 | Town |
| Ledyard | 20 | 1,595 | 1,705 | -1.3% | 44 | 36 | Town |
| Scipio | 21 | 1,482 | 1,528 | -0.47% | 41 | 37 | Town |
| Port Byron | 22 | 1,271 | 1,100 | 2.33% | 1,394 | 1 | Village |
| Moravia | 23 | 1,222 | 1,278 | -0.73% | 718 | 2 | Village |
| Venice | 24 | 1,219 | 1,237 | -0.41% | 30 | 41 | Town |
| Montezuma | 25 | 1,139 | 1,172 | -0.35% | 62 | 18 | Town |
| Niles | 26 | 1,122 | 1,131 | -0.27% | 29 | 39 | Town |
| Summerhill | 27 | 1,068 | 1,112 | -0.65% | 41 | 26 | Town |
| Union Springs | 28 | 1,064 | 1,106 | -0.65% | 609 | 2 | Village |
| Sempronius | 29 | 889 | 845 | 0.79% | 30 | 29 | Town |
| Fair Haven | 30 | 761 | 790 | -0.65% | 432 | 2 | Village |
| Aurora | 31 | 600 | 668 | -1.8% | 653 | 1 | Village |
| Cayuga | 32 | 577 | 468 | 3.22% | 638 | 1 | Village |
| Cato | 33 | 517 | 543 | -0.77% | 523 | 1 | Village |
| Meridian | 34 | 283 | 288 | -0.35% | 410 | 1 | Village |
Auburn is the largest city in Cayuga County, with a population of 25,511.
Meridian is the smallest city in Cayuga County, with a population of 283.
There are 34 cities in Cayuga County, New York.