| Chaullin Island | |
| Native Name: | Isla Chaullin |
| 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 |
| Additional Info: | NGA UFI -876702 |
Chaullin Island (Helvecia Island) is an islet part of the Calbuco Archipelago and is located between Putuqui Island and the West shore of the Reloncaví Sound with an approximate population of 12,500.