  Mattaangassut | |
| Geography | |
|---|---|
| Location | Greenland |
| Coordinates | 73°33′20″N 56°44′00″W / 73.55556°N 56.73333°W |
| Archipelago | Upernavik Archipelago |
| Administration | |
Greenland | |
| Municipality | Avannaata |
Mattaangassut Island (old spelling: Mátângassut) is an uninhabited island in Avannaata municipality in northwestern Greenland.