| Place | Post Code |
|---|---|
| Aguinaldo, Naguilian | 3302 |
| Bagong Sikat, Naguilian | 3302 |
| Burgos, Naguilian | 3302 |
| Cabaruan, Naguilian | 3302 |
| Flores, Naguilian | 3302 |
| La Union, Naguilian | 3302 |
| Magsaysay, Naguilian | 3302 |
| Manaring, Naguilian | 3302 |
| Mansibang, Naguilian | 3302 |
| Minallo, Naguilian | 3302 |
| Minanga, Naguilian | 3302 |
| Palattao, Naguilian | 3302 |
| Quezon, Naguilian | 3302 |
| Quinalabasa, Naguilian | 3302 |
| Quirino, Naguilian | 3302 |
| Rangayan, Naguilian | 3302 |
| Rizal, Naguilian | 3302 |
| Roxas, Naguilian | 3302 |
| San Manuel, Naguilian | 3302 |
| Santa Victoria, Naguilian | 3302 |
| Santo Tomas, Naguilian | 3302 |
| Sunlife, Naguilian | 3302 |
| Surcoc, Naguilian | 3302 |
| Tomines, Naguilian | 3302 |
| Villa Paz, Naguilian | 3302 |