10309 is the Postal Code/ZIP Code for the District of Rosario in the Costa Rica Province of San José and the Canton of Desamparados. The neighborhoods of Chirogres, Guadamarra, La Joya, Llano Bonito and Quebrada Honda are located in Postal Code 10309.
| Postal Code | 10309 |
| Postal Code Name | Rosario |
| Province | San José Province |
| Canton | Desamparados Canton |
| Timezone | Central Standard Time (CST) |
| Adjacent Postal Codes | 10302 10306 10602 10604 10606 10607 30107 |