| Locality | Post Code |
|---|---|
| Canoga, Seneca | 13148 |
| Fayette, Seneca | 13065 |
| Hayt Corners, Seneca | 14521 |
| Interlaken, Seneca | 14847 |
| Junius, Seneca | 13165 |
| Lodi, Seneca | 14860 |
| Mac Dougall, Seneca | 14541 |
| Ovid, Seneca | 14521 |
| Romulus, Seneca | 14541 |
| Seneca Falls, Seneca | 13148 |
| Tyre, Seneca | 13148 |
| Waterloo, Seneca | 13165 |
| Willard, Seneca | 14588 |