| Geography | |
|---|---|
| Location | Greenland |
| Coordinates | 73°33′20″N 56°44′00″W / 73.55556°N 56.73333°WCoordinates: 73°33′20″N 56°44′00″W / 73.55556°N 56.73333°W |
| Archipelago | Upernavik Archipelago |
| Administration | |
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Greenland
|
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| Municipality | Qaasuitsup |
Mattaangassut Island (old spelling: Mátângassut) is an uninhabited island in the Qaasuitsup municipality in northwestern Greenland.
Mattaangassut Island is located in Tasiusaq Bay, in the north-central part of Upernavik Archipelago. It is separated from Nutaarmiut Island in the southeast by a narrow Ikerasakassak strait, and from Qallunaat Island in the east by the waterways of Tasiusaq Bay.