| Locality | Post Code |
|---|---|
| Allens Point, Cayuga | 13160 |
| Atwater, Cayuga | 13081 |
| Auburn, Cayuga | 13021, 13024 |
| Aurelius, Cayuga | 13021 |
| Aurora, Cayuga | 13026 |
| Brutus, Cayuga | 13166 |
| Cato, Cayuga | 13033 |
| Cayuga, Cayuga | 13034 |
| Conquest, Cayuga | 13140 |
| East Genoa, Cayuga | 13092 |
| Fair Haven, Cayuga | 13064 |
| Farleys Point, Cayuga | 13160 |
| Fleming, Cayuga | 13021 |
| Fosterville, Cayuga | 13021 |
| Genoa, Cayuga | 13071 |
| Goodyears Corners, Cayuga | 13081 |
| King Ferry, Cayuga | 13081 |
| Ledyard, Cayuga | 13026 |
| Locke, Cayuga | 13092 |
| Martville, Cayuga | 13111 |
| Meridian, Cayuga | 13113 |
| Merrifield, Cayuga | 13147 |
| Montezuma, Cayuga | 13117 |
| Montville, Cayuga | 13118 |
| Moravia, Cayuga | 13118 |
| Owasco, Cayuga | 13021 |