| Place | Post Code |
|---|---|
| Caracas, San Antonio | 11003 |
| Cascabela, San Antonio | 11003 |
| Lámparas, San Antonio | 11003 |
| Llano, San Antonio | 11003 |
| Piedra de Fuego, San Antonio | 11003 |
| San Antonio, San Antonio | 11003 |
| All postal codes in Alajuelita | |
|---|---|
| Alajuelita, Alajuelita | |
| Concepción, Alajuelita | |
| San Antonio, Alajuelita | |
| San Felipe, Alajuelita | |
| San Josecito, Alajuelita | |