| Locality | Post Code |
|---|---|
| Unadilla, Otsego | 13849 |
| Warren, Otsego | 13439 |
| Welcome, Otsego | 13810 |
| Wells Bridge, Otsego | 13859 |
| West Burlington, Otsego | 13482 |
| West End, Otsego | 13820 |
| West Laurens, Otsego | 13796 |
| West Oneonta, Otsego | 13861 |
| Westford, Otsego | 13488 |
| Westville, Otsego | 12155 |
| Worcester, Otsego | 12197 |
| Youngs, Otsego | 13849 |