20903 is the Postal Code/ZIP Code for the District of Hacienda Vieja in the Costa Rica Province of Alajuela and the Canton of Orotina. The neighborhoods of Alumbre, Concepción, Hacienda Nueva, Marichal, Patio de Agua Sur, Pueblo Nuevo and Vista Mar are located in Postal Code 20903.
| Postal Code | 20903 |
| Postal Code Name | Hacienda Vieja |
| Province | Alajuela Province |
| Canton | Orotina Canton |
| Timezone | Central Standard Time (CST) |
| Adjacent Postal Codes | 11601 20401 20402 20502 20901 |