Karmøy most commonly refers to:
Karmøy Municipality, a municipality in Rogaland county, Norway Karmøy (island), the main island of the municipality of Karmøy
It may also refer to:
Mainland-Karmøy, the part of Karmøy Municipality located on the mainland of Norway Haugesund Airport, Karmøy, an airport on the island of Karmøy