| Place | Post Code |
|---|---|
| Alma Máter, Mercedes o Betania | 11503 |
| Betania, Mercedes o Betania | 11503 |
| Damiana, Mercedes o Betania | 11503 |
| Dent, Mercedes o Betania | 11503 |
| Guaymí, Mercedes o Betania | 11503 |
| Paso Hondo, Mercedes o Betania | 11503 |
| Paulina, Mercedes o Betania | 11503 |
| All postal codes in Montes de Oca | |
|---|---|
| Mercedes o Betania, Montes de Oca | |
| Sabanilla, Montes de Oca | |
| San Pedro, Montes de Oca | |
| San Rafael, Montes de Oca | |