| Place | Postal Code |
|---|---|
| Marang-Marang, Isabela | 7300 |
| Marketsite, Isabela | 7300 |
| Masula, Isabela | 7300 |
| Menzi, Isabela | 7300 |
| Panigayan, Isabela | 7300 |
| Panunsulan, Isabela | 7300 |
| Port Area, Isabela | 7300 |
| Riverside, Isabela | 7300 |
| San Rafael, Isabela | 7300 |
| Santa Barbara, Isabela | 7300 |
| Santa Cruz, Isabela | 7300 |
| Seaside, Isabela | 7300 |
| Small Kapatagan, Isabela | 7300 |
| Sumagdang, Isabela | 7300 |
| Sunrise Village, Isabela | 7300 |
| Tabiawan, Isabela | 7300 |
| Tabuk, Isabela | 7300 |
| Tampalan, Isabela | 7300 |
| Timpul, Isabela | 7300 |
| Postal Codes in City of Isabela | |
|---|---|
| Isabela, City of Isabela | |