Kongsberg is a historical mining town and municipality located in Buskerud county, Norway. It is situated on the river Numedalslågen at the entrance to the valley of Numedal.
The city has served as a center for silver mining, forestry, and arms production for centuries. In modern times, Kongsberg is known for its high technology industry and serves as the headquarters for Kongsberg Gruppen, which is Norway's largest defense contractor.