Qaarsorsuatsiaq Island (old spelling: Qaersorssuatsiaq) is an island in Avannaata municipality in northwestern Greenland.

Geography Qaarsorsuatsiaq Island is located in the outer belt of islands in Tasiusaq Bay, in the south-central part of Upernavik Archipelago. The inner waterways of Tasiusaq Bay separate it from Innaarsuit Island in the east. Several skerries buffer the western coast of the island.Upernavik, Saga Map, Tage Schjøtt, 1992 The highest point on the island is Cuthbert Peak in the west, reaching .

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