| Dinagat Island | |
| Map: | Mindanao#Philippines |
| Map Relief: | yes |
| Coordinates: | 10.1628°N 125.5894°W |
| Archipelago: | Dinagat Islands |
| Area Km2: | 802.12 |
| Country: | Philippines |
| Country Admin Divisions Title: | Region |
| Country Admin Divisions: | Caraga |
| Country Admin Divisions Title 1: | Province |
| Country Admin Divisions 1: | Dinagat Islands |
| Country Admin Divisions Title 2: | Municipalities |
| Country Largest City: | Basilisa |
| Country Largest City Population: | 36,911 |
| Population: | 106,951 |
| Population As Of: | 2000 |
| Density Km2: | 133.3 |
| Ethnic Groups: | Visayans (Surigaonon) |
Dinagat Island is an island located northeast of Mindanao in the Philippines.
Until December 2006, it was part of the province of Surigao del Norte. Being its main island, almost all municipalities of the province of Dinagat Islands are located on it.