| Prat Island | |
| Native Name: | Isla Prat |
| Map: | Chile |
| Coordinates: | -48.25°N -75°W |
| Waterbody: | Pacific Ocean |
| Area Km2: | 760.8 |
| Coastline Km: | 362.9 |
| Country: | Chile |
| Country Admin Divisions Title: | Region |
| Country Admin Divisions: | Aisén |
| Country Admin Divisions Title 1: | Province |
| Country Admin Divisions 1: | Capitán Prat |
| Country Admin Divisions Title 2: | Commune |
| Additional Info: | NGA UFI=-897241 |
Prat Island is an island in the Patagonian Archipelago, Chile. Its area is 762 km2.