| Lieu | Code postal |
|---|---|
| Biyabid, Sison | 8404 |
| Gacepan, Sison | 8404 |
| Ima, Sison | 8404 |
| Lower Patag, Sison | 8404 |
| Mabuhay, Sison | 8404 |
| Mayag, Sison | 8404 |
| Poblacion, Sison | 8404 |
| San Isidro, Sison | 8404 |
| San Pablo, Sison | 8404 |
| Tagbayani, Sison | 8404 |
| Tinogpahan, Sison | 8404 |
| Upper Patag, Sison | 8404 |