21403 is the Postal Code/ZIP Code for the District of El Amparo in the Costa Rica Province of Alajuela and the Canton of Los Chiles. The neighborhoods of Alto Los Reyes, Coyol, Las Palmitas, Pavoncito, Quebrada Grande, San Andrés, San Francisco, San Isidro, San Macario, San Matías and Santa Rita are located in Postal Code 21403.
| Postal Code | 21403 |
| Postal Code Name | El Amparo |
| Province | Alajuela Province |
| Canton | Los Chiles Canton |
| Timezone | Central Standard Time (CST) |
| Adjacent Postal Codes | 21013 21401 21402 21404 21502 |