Ballangen is a municipality in Nordland county, Norway. It is part of the Ofoten region. The administrative centre of the municipality is the village of Ballangen. Ballangen was separated from Evenes on 1 July 1925. The area of Efjorden was transferred from Lødingen to Ballangen on 1 January 1962.
The municipality borders Narvik to the east and Tysfjord to the south, and has a short border with Sweden to the southeast. Ballangen is situated on the southern shore of Ofotfjorden. Ballangen also includes the long and narrow Efjorden, just south of the much larger Ofotfjorden. Its immediate surroundings are dominated by fjords, mountains and forests. Ballangen relies on the neighbouring Narvik as its economic base.
The Old Norse form of the name was Bagangr. The meaning of the first element is unknown, and the last element is angr which means "fjord".The coat-of-arms is from modern times. They were granted on 18 July 1980. The arms show a hammer as a symbol for the mining in the municipality. There used to be copper mines in the municipality. The green background symbolizes agriculture.