| Locality | Post Code |
|---|---|
| Poplar Ridge, Cayuga | 13139 |
| Port Byron, Cayuga | 13140 |
| Scipio, Cayuga | 13147 |
| Scipio Center, Cayuga | 13147 |
| Scipioville, Cayuga | 13147 |
| Sempronius, Cayuga | 13118 |
| Sennett, Cayuga | 13021 |
| Springport, Cayuga | 13160 |
| Sterling, Cayuga | 13156 |
| Summerhill, Cayuga | 13092 |
| Throop, Cayuga | 13021 |
| Union Springs, Cayuga | 13160 |
| Venice, Cayuga | 13147 |
| Weedsport, Cayuga | 13166 |