| Postal Code | Postal Code Place Name | Province | Canton |
|---|---|---|---|
| 50801 | Tilarán | Guanacaste | Tilarán |
| 50802 | Quebrada Grande | Guanacaste | Tilarán |
| 50803 | Tronadora | Guanacaste | Tilarán |
| 50804 | Santa Rosa | Guanacaste | Tilarán |
| 50805 | Líbano | Guanacaste | Tilarán |
| 50806 | Tierras Morenas | Guanacaste | Tilarán |
| 50807 | Arenal | Guanacaste | Tilarán |