| Place | Post Code |
|---|---|
| Baldios, Santa Ignacia | 2303 |
| Botbotones, Santa Ignacia | 2303 |
| Caanamongan, Santa Ignacia | 2303 |
| Cabaruan, Santa Ignacia | 2303 |
| Cabugbugan, Santa Ignacia | 2303 |
| Caduldulaoan, Santa Ignacia | 2303 |
| Calipayan, Santa Ignacia | 2303 |
| Macaguing, Santa Ignacia | 2303 |
| Nambalan, Santa Ignacia | 2303 |
| Padapada, Santa Ignacia | 2303 |
| Pilpila, Santa Ignacia | 2303 |
| Pinpinas, Santa Ignacia | 2303 |
| Poblacion East, Santa Ignacia | 2303 |
| Poblacion West, Santa Ignacia | 2303 |
| Pugo-Cecilio, Santa Ignacia | 2303 |
| San Francisco, Santa Ignacia | 2303 |
| San Sotero, Santa Ignacia | 2303 |
| San Vicente, Santa Ignacia | 2303 |
| Santa Ines Centro, Santa Ignacia | 2303 |
| Santa Ines East, Santa Ignacia | 2303 |
| Santa Ines West, Santa Ignacia | 2303 |
| Taguiporo, Santa Ignacia | 2303 |
| Timmaguab, Santa Ignacia | 2303 |
| Vargas, Santa Ignacia | 2303 |