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. Other villages include Elvenes, Laberg, and Seljeskog.

The municipality is situated along the Sagfjorden in south central Troms county. The municipality is mostly coastal areas around the fjord as well as some inland valleys. Salangen is home to the world's northernmost bat population.

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".

The coat-of-arms is from modern times. They were granted on 2 December 1985. The arms show a seal on a blue background. They are canting arms since the name of the municipality is derived from the old word "Sellanger", meaning seal fjord.

The Church of Norway has one parish (sokn) within the municipality of Salangen. It is part of the Indre Troms deanery in the Diocese of Nord-Hålogaland.

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