| Calbuco Island | |
| Native Name: | Isla Calbuco |
| Map: | Chile Los Lagos |
| Coordinates: | -41.7801°N -73.1395°W |
| Waterbody: | Reloncaví Sound, Pacific Ocean |
| Country: | Chile |
| Country Admin Divisions Title: | Region |
| Country Admin Divisions: | Los Lagos |
| Country Admin Divisions Title 1: | Province |
| Country Admin Divisions 1: | Llanquihue |
| Country Admin Divisions Title 2: | Commune |
| Country Admin Divisions 2: | Calbuco |
| Additional Info: | NGA UFI -874659 |
Calbuco Island (also Caicaén Island) is an island in the commune of Calbuco, Llanquihue Province, Los Lagos Region, Chile. The city of Calbuco is on the island. The island was separated from the mainland by Calbuco Channel, but a causeway was built in 1965 to connect the island to the continent.[1]
In 1603 the Spanish under the command of Francisco Hernández Ortiz-Pizarrro established a fort on the island to protect their settlements in the Gulf of Ancud.[2]