| Place | Post Code |
|---|---|
| Castilla, Castilla | 20003, 20002 |
| Chapayra, Castilla | 20000 |
| Cruz de Caña, Castilla | 20000 |
| El Papayo, Castilla | 20000 |
| Ex Predio Tacala, Castilla | 20000 |
| Huaquillas (Comunidad Campesina Huaquillas), Castilla | 20000 |
| La Obrilla, Castilla | 20000 |
| Las Mercedes, Castilla | 20000 |
| Loma el Mirador, Castilla | 20000 |
| Miraflores, Castilla | 20002 |
| Rio Seco, Castilla | 20000 |
| San Rafael, Castilla | 20000 |
| San Vicente, Castilla | 20000 |
| Sector Chocan, Castilla | 20000 |
| Terela, Castilla | 20000 |
| Virgen de Fatima, Castilla | 20000 |