Sørøysundet is a strait in Finnmark, Norway. It has a length of about 70 kilometres (40 mi), and a width between 4 and 17 km (2.5 and 10.6 mi). The strait separates Sørøya from the islands of Stjernøya, Seiland and Kvaløya. To the southwest the strait opens up into Lopphavet.
Coordinates: 70°32′N 23°00′E / 70.533°N 23.000°E