| Locality | Post Code |
|---|---|
| Cabrería, Santa Catalina | Y4653 XAF |
| Calahoyo, Santa Catalina | Y4655 XAA |
| Canchuela, Santa Catalina | Y4655 XAB |
| Casira, Santa Catalina | Y4653 XAG |
| Cerrito, Santa Catalina | Y4653 XAH |
| Cieneguillas, Santa Catalina | Y4653 |
| Corral Blanco, Santa Catalina | Y4655 XAR, Y4655 XAC |
| Guayatayoc, Santa Catalina | Y4653 XAB |
| Hornillos, Santa Catalina | Y4653 XAI |
| La Ciénaga, Santa Catalina | Y4618 XDF, Y4618 XAB |
| La Cruz, Santa Catalina | Y4655 XAL |
| Merco, Santa Catalina | Y4655 XAF |
| Minas Azules, Santa Catalina | Y4655 XAG |
| Mires, Santa Catalina | Y4655 XAH |
| Morro, Santa Catalina | Y4655 XAI |
| Oratorio, Santa Catalina | Y4656 |
| Ornillo, Santa Catalina | Y4653 XAE |
| Oros San Juan, Santa Catalina | Y4655 XAM |
| Pasajes, Santa Catalina | Y4653 XAL |
| Pasto Pampa, Santa Catalina | Y4653 XAM |
| Potrero, Santa Catalina | Y4653 XAC |
| Puesto Chico, Santa Catalina | Y4653 XAN |
| Puesto Grande, Santa Catalina | Y4653 XAO |
| Rodeo Chico, Santa Catalina | Y4653 XAP |
| San Francisco, Santa Catalina | Y4655 XAN |
| San Juan, Santa Catalina | Y4655 XAD |