| Place | Post Code |
|---|---|
| Adovis, Casiguran | 4702 |
| Boton, Casiguran | 4702 |
| Burgos, Casiguran | 4702 |
| Casay, Casiguran | 4702 |
| Cawit, Casiguran | 4702 |
| Central, Casiguran | 4702 |
| Cogon, Casiguran | 4702 |
| Colambis, Casiguran | 4702 |
| Escuala, Casiguran | 4702 |
| Inlagadian, Casiguran | 4702 |
| Lungib, Casiguran | 4702 |
| Mabini, Casiguran | 4702 |
| Ponong, Casiguran | 4702 |
| Rizal, Casiguran | 4702 |
| San Antonio, Casiguran | 4702 |
| San Isidro, Casiguran | 4702 |
| San Juan, Casiguran | 4702 |
| San Pascual, Casiguran | 4702 |
| Santa Cruz, Casiguran | 4702 |
| Somal-Ot, Casiguran | 4702 |
| Tigbao, Casiguran | 4702 |
| Timbayog, Casiguran | 4702 |
| Tiris, Casiguran | 4702 |
| Trece Martirez, Casiguran | 4702 |
| Tulay, Casiguran | 4702 |