Qassersuaq Peninsula (old spelling: Qagsserssuaq) is a mainland peninsula in northwestern Greenland, located in the south-central part of Upernavik Archipelago.
[1] The peninsula is of triangular shape, with the base adjacent to the Greenland ice sheet (Greenlandic: Sermersuaq), south of the Alanngorsuup Sermia glacier.
The distance from the Qaassorsuaq promontory in the west at 73°05′10″N 55°42′55″W / 73.08611°N 55.71528°W / 73.08611; -55.71528, to the innermost unglaciated part of the mainland is 24.3 km (15.1 mi).
[1] The peninsula is very mountainous, culminating in several glaciated summits.
The highest, unnamed peak in the center of the peninsula reaches 1,160 m (3,810 ft).