| Place | Post Code |
|---|---|
| Aguingayan, San Jose de Buan | 6723 |
| Babaclayon, San Jose de Buan | 6723 |
| Barangay 1, San Jose de Buan | 6723 |
| Barangay 2, San Jose de Buan | 6723 |
| Barangay 3, San Jose de Buan | 6723 |
| Barangay 4, San Jose de Buan | 6723 |
| Can-Aponte, San Jose de Buan | 6723 |
| Cataydongan, San Jose de Buan | 6723 |
| Gusa, San Jose de Buan | 6723 |
| Hagbay, San Jose de Buan | 6723 |
| Hibaca-An, San Jose de Buan | 6723 |
| Hiduroma, San Jose de Buan | 6723 |
| Hilumot, San Jose de Buan | 6723 |
| San Nicolas, San Jose de Buan | 6723 |