Kangerlussuatsiaq Fjord is a fjord in the Qeqqata municipality in western Greenland. Taking its source in the tidewater glaciers draining the Maniitsoq ice sheet, the fjord flows in a deep canyon through a mountainous, uninhabited region, emptying into Davis Strait near the settlement of Kangaamiut.
Kangerlussuatsiaq Fjord is 75 km (46.6 mi) long and 700 m (2,300 ft) deep. After the confluence the fjord heads to the southwest, bounded from both sides by mountain cliffs exceeding 2,000 metres (6,600 ft). The mountains near the middle part of the fjord is considered the best heliskiing and mountaineering region in Greenland. After that point the fjord widens, while the mountain cliffs are half as high as in the central section.
The fjord opens into Davis Strait, with its mouth dotted with several skerries. A hydroelectric power plant at the source of the Majorqaq river would yield an estimated energy output of 1,000 gigawatts per year. Combined with the second plant near Kangerlussuatsiaq Fjord with 3,170 gigawatts per year, the energy would be sufficient to power the aluminium plant near Maniitsoq. The ultimate decision as to the location of the plant has not yet been taken.