| Zip Code | City | Population ↓ |
|---|---|---|
| 13021 | Auburn | 37,640 |
| 13118 | Moravia | 5,811 |
| 13166 | Weedsport | 5,758 |
| 13140 | Port Byron | 4,335 |
| 13033 | Cato | 3,661 |
| 13092 | Locke | 2,726 |
| 13160 | Union Springs | 2,262 |
| 13156 | Sterling | 2,169 |
| 13034 | Cayuga | 2,022 |
| 13111 | Martville | 1,790 |
| 13026 | Aurora | 1,737 |
| 13024 | Auburn | 1,380 |
| 13081 | King Ferry | 1,114 |
| 13147 | Scipio Center | 929 |
| 13071 | Genoa | 864 |
| 13117 | Montezuma | 279 |
| 13113 | Meridian | 52 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 17 ZCTAs in Cayuga County, New York (US Census).