Aappilattoq Island is located in the southern part of Upernavik Archipelago. It forms part of the chain of islands bounding Upernavik Icefjord from the south. The island is separated by inner waterways of Baffin Bay from the large Nutaarmiut Island in the southeast, from Nunaa Island in the south, and from Ammaussarsuaq Island in the southeast.
The highest point on the island is the 490 m (1,610 ft) Paattup Qaqqaa mountain in the central part of the island. The coastline of the island is complicated, with the island nearly in two rocky parts, with only a small isthmus joining the halves.
- Upernavik, Saga Map, Tage Schjøtt, 1992
- "Population in localities January 1.st by locality, age, gender and place of birth 1977-2010". Statistics Greenland. Archived from the original on 21 July 2011. Retrieved 5 September 2010.