21504 is the Postal Code/ZIP Code for the District of Katira in the Costa Rica Province of Alajuela and the Canton of Guatuso. The neighborhoods of Barrio El Progreso, Barrio San Antonio and Guaire are located in Postal Code 21504.
| Postal Code | 21504 |
| Postal Code Name | Katira |
| Province | Alajuela Province |
| Canton | Guatuso Canton |
| Timezone | Central Standard Time (CST) |
| Adjacent Postal Codes | 21301 21304 21307 21402 21501 21502 21503 50602 |