11503 is the Postal Code/ZIP Code for the District of Mercedes in the Costa Rica Province of San José and the Canton of Montes de Oca. The neighborhoods of Alma Máter, La Paulina and Paso Hondo are located in Postal Code 11503.
| Postal Code | 11503 |
| Postal Code Name | Mercedes |
| Province | San José Province |
| Canton | Montes de Oca Canton |
| Timezone | Central Standard Time (CST) |
| Adjacent Postal Codes | 10101 10801 11501 11502 |