Torsken is a former municipality that was located on the western coast of the large island of Senja in Troms county, Norway. The municipality existed from 1902 until its dissolution in 2020 when it was merged into the new Senja Municipality. The administrative centre of the municipality was the village of Gryllefjord. Other larger villages in Torsken Municipality included the villages of Torsken, Medby, and Flakstadvåg.