Salliaruseq Island is an uninhabited island in the Qaasuitsup municipalityin northwestern Greenland. At 130 sq. km, it is one of the larger islands in the Uummannaq Fjord system, located in its central part due east of Uummannaq Island. Air Greenland helicopters approach Uummannaq Heliport on the way from Qaarsut Airport alongside the western wall of Salliaruseq, first converging to the island, to then turn 90 degrees to the west due to winds in the Assorput Strait.
It is very mountainous, with precipitous walls falling from the summit plateau (Qollortoq) to the south (Ujarassuaq), west (Innarsuaq), and north (Alaanguaraq). The highest point on the island is Inussugtalik (1,418 m (4,652.2 ft)) above the northern wall. The next highest point in the vicinity of the island is the Uummannaq Mountain on the western side of the Assorput Strait.