| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Auburn | 1 | 25,717 | 26,867 | -0.89% | 3,085 | 8 | City |
| Aurora | 2 | 13,808 | 13,845 | -0.16% | 379 | 36 | Town |
| Brutus | 3 | 4,223 | 4,311 | -0.02% | 191 | 22 | Town |
| Owasco | 4 | 3,462 | 3,555 | -0.17% | 166 | 21 | Town |
| Sennett | 5 | 3,278 | 3,304 | 0.61% | 114 | 29 | Town |
| Sterling | 6 | 3,157 | 3,218 | 0% | 69 | 45 | Town |
| Moravia | 7 | 3,062 | 3,223 | -2.27% | 106 | 29 | Town |
| Aurelius | 8 | 2,644 | 2,618 | 0.04% | 87 | 30 | Town |
| Cato | 9 | 2,403 | 2,441 | 0.08% | 71 | 34 | Town |
| Fleming | 10 | 2,396 | 2,456 | -0.17% | 110 | 22 | Town |
| Mentz | 11 | 2,202 | 2,105 | -0.23% | 130 | 17 | Town |
| Springport | 12 | 2,134 | 2,203 | -0.19% | 100 | 21 | Town |
| Ira | 13 | 2,116 | 2,145 | 0.33% | 61 | 35 | Town |
| Locke | 14 | 1,896 | 1,876 | 0.16% | 78 | 24 | Town |
| Throop | 15 | 1,797 | 1,828 | 0% | 97 | 19 | Town |
| Genoa | 16 | 1,780 | 1,816 | -0.11% | 45 | 40 | Town |
| Conquest | 17 | 1,755 | 1,790 | 0.17% | 50 | 35 | Town |
| Weedsport | 18 | 1,747 | 1,813 | -0.74% | 1,790 | 1 | Village |
| Victory | 19 | 1,733 | 1,649 | 2.67% | 50 | 34 | Town |
| Scipio | 20 | 1,519 | 1,545 | 0.2% | 42 | 37 | Town |
| Port Byron | 21 | 1,244 | 1,105 | 2.39% | 1,364 | 1 | Village |
| Venice | 22 | 1,234 | 1,239 | 0% | 30 | 41 | Town |
| Moravia | 23 | 1,224 | 1,273 | -0.73% | 719 | 2 | Village |
| Montezuma | 24 | 1,150 | 1,173 | -0.09% | 63 | 18 | Town |
| Niles | 25 | 1,142 | 1,131 | 0.62% | 29 | 39 | Town |
| Summerhill | 26 | 1,096 | 1,109 | 0.46% | 42 | 26 | Town |
| Ledyard | 27 | 1,058 | 1,660 | -21.63% | 29 | 36 | Town |
| Union Springs | 28 | 1,050 | 1,085 | -0.66% | 601 | 2 | Village |
| Sempronius | 29 | 905 | 845 | 1.57% | 31 | 29 | Town |
| Fair Haven | 30 | 765 | 790 | -0.65% | 434 | 2 | Village |
| Cayuga | 31 | 567 | 487 | 2.9% | 627 | 1 | Village |
| Cato | 32 | 512 | 537 | -0.97% | 518 | 1 | Village |
| Aurora | 33 | 329 | 617 | 0% | 358 | 1 | Village |
| Meridian | 34 | 283 | 289 | -0.7% | 410 | 1 | Village |
Auburn is the largest city in Cayuga County, with a population of 25,717.
Meridian is the smallest city in Cayuga County, with a population of 283.
There are 34 cities in Cayuga County, New York.