| All postal codes in Castilla |
| Andagua, Castilla |
| Aplao, Castilla |
| Ayo, Castilla |
| Chachas, Castilla |
| Chilcaymarca, Castilla |
| Choco, Castilla |
| Huancarqui, Castilla |
| Machaguay, Castilla |
| Orcopampa, Castilla |
| Pampacolca, Castilla |
| Tipán, Castilla |
| Uñon, Castilla |
| Uraca, Castilla |
| Viraco, Castilla |