| Place | Post Code |
|---|---|
| Cabayogan, San Isidro | 2809 |
| Dalimag, San Isidro | 2809 |
| Langbaban, San Isidro | 2809 |
| Manayday, San Isidro | 2809 |
| Pantoc, San Isidro | 2809 |
| Poblacion, San Isidro | 2809 |
| Sabtan-Olo, San Isidro | 2809 |
| San Marcial, San Isidro | 2809 |
| Tangbao, San Isidro | 2809 |