| Place | Post Code |
|---|---|
| Urszulin, Bychawa | 23-100 |
| Wandzin, Bychawa | 23-100 |
| Wincentówek, Bychawa | 23-100 |
| Władysławów, Bychawa | 23-100 |
| Wola Duża, Bychawa | 23-100 |
| Wola Duża-Kolonia, Bychawa | 23-100 |
| Wola Gałęzowska, Bychawa | 23-100 |
| Wola Gałęzowska-Kolonia, Bychawa | 23-100 |
| Zadębie, Bychawa | 23-100 |
| Zaraszów, Bychawa | 23-100 |
| Zaraszów-Kolonia, Bychawa | 23-100 |
| Zdrapy, Bychawa | 23-100 |