| Place | Post Code |
|---|---|
| Ason, Garchitorena | 4428 |
| Bahi, Garchitorena | 4428 |
| Barangay I, Garchitorena | 4428 |
| Barangay II, Garchitorena | 4428 |
| Barangay III, Garchitorena | 4428 |
| Barangay IV, Garchitorena | 4428 |
| Binagasbasan, Garchitorena | 4428 |
| Burabod, Garchitorena | 4428 |
| Cagamutan, Garchitorena | 4428 |
| Cagnipa, Garchitorena | 4428 |
| Canlong, Garchitorena | 4428 |
| Dangla, Garchitorena | 4428 |
| Del Pilar, Garchitorena | 4428 |
| Denrica, Garchitorena | 4428 |
| Harrison, Garchitorena | 4428 |
| Mansangat, Garchitorena | 4428 |
| Pambuhan, Garchitorena | 4428 |
| Sagrada, Garchitorena | 4428 |
| Salvacion, Garchitorena | 4428 |
| San Vicente, Garchitorena | 4428 |
| Sumaoy, Garchitorena | 4428 |
| Tamiawon, Garchitorena | 4428 |
| Toytoy, Garchitorena | 4428 |