| Ateqanngitsorsuaq | |
| Map: | Greenland |
| Archipelago: | Upernavik Archipelago |
| Location: | Greenland |
| Coordinates: | 73.225°N -55.8667°W |
| Country: | Greenland |
| Country Admin Divisions Title: | Municipality |
| Country Admin Divisions: | Avannaata |
Ateqanngitsorsuaq Island (old spelling: Ateqángitsorssuaq) is an uninhabited island in Avannaata municipality in northwestern Greenland.
Ateqanngitsorsuaq Island is located in the outer belt of islands in Tasiusaq Bay, in the south-central part of Upernavik Archipelago. In the south, it is separated from sibling Innaarsuit Island by a very narrow channel. Unlike the latter, it is mountainous, with the highest point reaching 516m (1,693feet) in an unnamed summit in the center of the island.[1]
The inner waterways of Tasiusaq Bay separate it from Qaqaarissorsuaq Island in the northeast. Several skerries buffer the eastern coast of the island.[1]