| Diego de Almagro Island | |
| Native Name: | Isla Diego de Almagro |
| Map: | Pacific Ocean |
| Coordinates: | -51.4167°N -83°W |
| Waterbody: | Pacific Ocean |
| Area Km2: | 376 |
| Coastline Km: | 235.2 |
| Country: | Chile |
| Country Admin Divisions Title: | Region |
| Country Admin Divisions: | Magallanes |
| Country Admin Divisions Title 1: | Province |
| Country Admin Divisions 1: | Última Esperanza |
| Country Admin Divisions Title 2: | Commune |
| Country Admin Divisions 2: | Puerto Natales |
| Additional Info: | NGA UFI=-879670 |
Diego de Almagro Island (Spanish: Isla Diego de Almagro), formerly known as Cambridge Island, is an island in the Magallanes Region, Chile. It is located South-West of Hanover Island. It is named after Diego de Almagro.