| Districts |
|---|
| Aguas Claras, Upala |
| Bijagua, Upala |
| Delicias, Upala |
| Dos Ríos, Upala |
| San José o Pizote, Upala |
| Upala, Upala |
| Yolillal, Upala |
| All postal codes in Alajuela |
|---|
| Alajuela |
| Atenas |
| Grecia |
| Guatuso |
| Los Chiles |
| Naranjo |
| Orotina |
| Palmares |
| Poás |
| San Carlos |
| San Mateo |
| San Ramón |
| Upala |
| Valverde Vega |
| Zarcero |