| Place |
Post Code |
| Ambitacay, Santo Tomas |
2507 |
| Bail, Santo Tomas |
2507 |
| Balaoc, Santo Tomas |
2507 |
| Balsaan, Santo Tomas |
2507 |
| Baybay, Santo Tomas |
2507 |
| Cabaruan, Santo Tomas |
2507 |
| Casantaan, Santo Tomas |
2507 |
| Casilagan, Santo Tomas |
2507 |
| Cupang, Santo Tomas |
2507 |
| Damortis, Santo Tomas |
2507 |
| Fernando, Santo Tomas |
2507 |
| Linong, Santo Tomas |
2507 |
| Lomboy, Santo Tomas |
2507 |
| Malabago, Santo Tomas |
2507 |
| Namboongan, Santo Tomas |
2507 |
| Namonitan, Santo Tomas |
2507 |
| Narvacan, Santo Tomas |
2507 |
| Patac, Santo Tomas |
2507 |
| Poblacion, Santo Tomas |
2507 |
| Pongpong, Santo Tomas |
2507 |
| Raois, Santo Tomas |
2507 |
| Tococ, Santo Tomas |
2507 |
| Tubod, Santo Tomas |
2507 |
| Ubagan, Santo Tomas |
2507 |
| All postal codes in La Union |
| Agoo, La Union |
| Aringay, La Union |
| Bacnotan, La Union |
| Bagulin, La Union |
| Balaoan, La Union |
| Bangar, La Union |
| Bauang, La Union |
| Burgos, La Union |
| Caba, La Union |
| Luna, La Union |
| Naguilian, La Union |
| Pugo, La Union |
| Rosario, La Union |
| San Fernando, La Union |
| San Gabriel, La Union |
| San Juan, La Union |
| Santo Tomas, La Union |
| Santol, La Union |
| Sudipen, La Union |
| Tubao, La Union |