Aajuitsup Tasia (old spelling: Aujuitsup Tasia) is a large lake in central-western Greenland, in the Qeqqata municipality. It is located approximately 12 km (7.5 mi) northeast of Kangerlussuaq. It is of elongated oval shape, with its western shore at (67°04′45″N50°30′02″W) and its eastern shore at (67°05′35″N50°16′30″W)