Tromsøysund may refer to:
Places Tromsøysund Municipality, a former municipality in Troms county, Norway Tromsøysund Church (also known as the Arctic Cathedral), a church in Tromsø Municipality in Troms county, Norway Tromsøysundet, a strait in Tromsø Municipality in Troms county, Norway
Other FK Tromsøysund, a football club in Tromsø Municipality in Troms county, Norway Tromsøysund Tunnel, an undersea road tunnel in Tromsø Municipality in Troms county, Norway