43 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Auburn | 1 | 25,737 | 26,866 | -0.87% | 3,088 | 8 | City |
| Aurora | 2 | 13,948 | 13,843 | 0.33% | 383 | 36 | Town |
| Radisson | 3 | 9,044 | 6,851 | 7.14% | 2,001 | 5 | CDP |
| Brutus | 4 | 4,199 | 4,308 | -0.43% | 190 | 22 | Town |
| Village Green | 5 | 3,711 | 3,701 | -0.32% | 3,216 | 1 | CDP |
| Owasco | 6 | 3,456 | 3,552 | -0.37% | 166 | 21 | Town |
| Moravia | 7 | 3,352 | 3,224 | 4.59% | 116 | 29 | Town |
| SUNY Oswego | 8 | 3,254 | 3,656 | -0.85% | 9,656 | 0 | CDP |
| Sennett | 9 | 3,204 | 3,306 | -0.99% | 111 | 29 | Town |
| Sterling | 10 | 3,145 | 3,220 | -0.35% | 69 | 45 | Town |
| Aurelius | 11 | 2,698 | 2,595 | 3.06% | 89 | 30 | Town |
| Munsons Corners | 12 | 2,668 | 2,906 | -0.15% | 1,204 | 2 | CDP |
| Cato | 13 | 2,397 | 2,441 | -0.13% | 71 | 34 | Town |
| Fleming | 14 | 2,395 | 2,470 | -0.5% | 110 | 22 | Town |
| Mentz | 15 | 2,193 | 2,106 | -0.54% | 130 | 17 | Town |
| Springport | 16 | 2,150 | 2,227 | -0.51% | 100 | 21 | Town |
| Seneca Knolls | 17 | 2,103 | 1,759 | 0.29% | 1,660 | 1 | CDP |
| Ira | 18 | 2,082 | 2,141 | -0.38% | 60 | 35 | Town |
| Melrose Park | 19 | 1,923 | 2,259 | -1.28% | 515 | 4 | CDP |
| Locke | 20 | 1,876 | 1,877 | -0.21% | 77 | 24 | Town |
| Throop | 21 | 1,789 | 1,828 | -0.39% | 96 | 19 | Town |
| Genoa | 22 | 1,779 | 1,818 | -0.28% | 45 | 40 | Town |
| Weedsport | 23 | 1,749 | 1,808 | -0.68% | 1,792 | 1 | Village |
| Conquest | 24 | 1,729 | 1,790 | -0.69% | 49 | 35 | Town |
| Victory | 25 | 1,651 | 1,652 | 0.36% | 48 | 34 | Town |
| Ledyard | 26 | 1,616 | 1,705 | -1.28% | 45 | 36 | Town |
| Scipio | 27 | 1,489 | 1,528 | -0.47% | 41 | 37 | Town |
| Port Byron | 28 | 1,242 | 1,100 | 2.31% | 1,362 | 1 | Village |
| Moravia | 29 | 1,231 | 1,278 | -0.81% | 723 | 2 | Village |
| Venice | 30 | 1,224 | 1,237 | -0.41% | 30 | 41 | Town |
| Montezuma | 31 | 1,143 | 1,172 | -0.35% | 63 | 18 | Town |
| Niles | 32 | 1,125 | 1,131 | -0.27% | 29 | 39 | Town |
| Cortland West | 33 | 1,121 | 1,313 | -1.41% | 217 | 5 | CDP |
| Summerhill | 34 | 1,075 | 1,112 | -0.65% | 42 | 26 | Town |
| Union Springs | 35 | 1,071 | 1,106 | -0.65% | 613 | 2 | Village |
| Sempronius | 36 | 882 | 845 | 0.8% | 30 | 29 | Town |
| Fair Haven | 37 | 766 | 790 | -0.65% | 435 | 2 | Village |
| Aurora | 38 | 611 | 668 | -1.93% | 665 | 1 | Village |
| Cayuga | 39 | 559 | 468 | 3.33% | 618 | 1 | Village |
| Cato | 40 | 521 | 543 | -0.95% | 527 | 1 | Village |
| McLean | 41 | 486 | 226 | 7.05% | 2,095 | 0 | CDP |
| Virgil | 42 | 290 | 574 | 7.01% | 324 | 1 | CDP |
| Meridian | 43 | 284 | 288 | -0.35% | 411 | 1 | Village |
Auburn is the largest city in Cayuga County, with a population of 25,737.
Meridian is the smallest city in Cayuga County, with a population of 284.
There are 43 cities in Cayuga County, New York.