Tromsøysundet is a strait located in the municipality of Tromsø in Troms county, Norway. It separates the island of Tromsøya (the location of the Tromsø city centre) from the mainland east of the island. The strait is crossed by the Tromsøysund Tunnel (E8 highway) and the Tromsø Bridge. The strait is about long and it ranges from about to wide. The strait connects to the Balsfjorden and Straumsfjorden to the south and into the Kvalsundet and Grøtsundet to the north.

Tromsøysundet is a strait located in the municipality of Tromsø in Troms county, Norway. It separates the island of Tromsøya (the location of the Tromsø city centre) from the mainland east of the island. The strait is crossed by the Tromsøysund Tunnel (E8 highway) and the Tromsø Bridge. The strait is about long and it ranges from about to wide. The strait connects to the Balsfjorden and Straumsfjorden to the south and into the Kvalsundet and Grøtsundet to the north.