| Place | Post Code |
|---|---|
| Burío, Mercedes | 40102 |
| Carbonal, Mercedes | 40102 |
| Cubujuquí, Mercedes | 40102 |
| España, Mercedes | 40102 |
| Labrador, Mercedes | 40102 |
| Mercedes Norte, Mercedes | 40102 |
| Mercedes Sur, Mercedes | 40102 |
| Monte Bello, Mercedes | 40102 |
| San Jorge, Mercedes | 40102 |
| Santa Inés, Mercedes | 40102 |
| All postal codes in Heredia | |
|---|---|
| Heredia, Heredia | |
| Mercedes, Heredia | |
| San Francisco, Heredia | |
| Ulloa, Heredia | |
| Vara Blanca, Heredia | |