Salangen is a municipality in Troms county, Norway. The administrative centre of the municipality is the village of Sjøvegan, where most of the people in the municipality live. The municipality is situated along the Sagfjord, and also includes some inland valleys. The village of Laberg is located near Sjøvegan.
Salangen was established on 1 January 1871 when it was separated from the municipality of Ibestad. The initial population of Salangen was 1,384. On 1 January 1964, the municipality of Lavangen (population: 1,677) was merged into Salangen. The new, larger Salangen then had a population of 4,288. On 1 January 1977, however, the Lavangen district (except for Lavangsnes) was separated from Salangen to form a separate municipality once again. After the split, Salangen remained with 2,611 residents.
The municipality is named after the Salangen fjord (Old Norse: Selangr). The first element is selr which means "seal" and the last element is angr which means "fjord".