Salliaruseq Island (old spelling: Sagdliaruseq, Danish: Storøen, translated: The-big-island) is an uninhabited island in the Qaasuitsup municipality in northwestern Greenland. At 130 km² (50.2 sq mi), it is one of the larger islands in the Uummannaq Fjord system, located in its central part due east of Uummannaq Island.