Kangerlussuaq Icefjord (old spelling: Kangerdlugssuaq, Danish: Giesecke Isfjord) is a fjord in Avannaata municipality in northwestern Greenland.

The fjord head is located at 73°30′N 55°28′W / 73.500°N 55.467°W / 73.500; -55.467, where the southern tongue of Giesecke Glacier, named (Greenlandic: Kakiffait Sermiat), reaches the fjord.

[1] The innermost portion of the fjord bears a different name: Qaaneq (old spelling: Qâneq).

It is an inner extension of Kangerlussuaq Icefjord, with the flow from one to the other disrupted by the Kakiffait Sermiat glacier tongue.

The head of Qaaneq Fjord is located at 73°21′30″N 55°02′22″W / 73.35833°N 55.03944°W / 73.35833; -55.03944, situated between two nunataks on the mainland of Greenland, bounding it from the north and from the southwest.