| Acuy Island | |
| Native Name: | Isla Acuy |
| Coordinates: | -42.9214°N -73.4282°W |
| Length Km: | 2 |
| Width Km: | 0.5 |
| Country: | Chile |
| Country Admin Divisions Title: | Region |
| Country Admin Divisions: | Los Ríos |
| Country Admin Divisions Title 1: | Province |
| Country Admin Divisions 1: | Chiloé Province |
| Country Admin Divisions Title 2: | Commune |
| Country Admin Divisions 2: | Queilén |
| Population: | 135 |
| Additional Info: | NGA UFI=-871214 |
Acuy is a small island southeast of the town of Queilén. It is about 2 km long and 500 m wide at its largest points, and therefore has only a small population.
The population is mainly devoted to fishing and gathering luga.