Tromsøysundet (Norwegian) or Romssanuorri (Northern Sami)[1] is a strait located in Tromsø Municipality in Troms county, Norway.

The 11-kilometre (6.8 mi) long strait separates the island of Tromsøya (the location of the city of Tromsø) from the mainland east of the island.

The strait is crossed by the Tromsøysund Tunnel (E8 highway) and by the Tromsø Bridge.

The strait ranges from about 0.6–3 kilometres (0.4–1.9 mi) wide.

This article about a location in Troms is a stub.