The Norwegian State Railways was a state-owned railway company that operated most of the railway network in Norway. The government agency/directorate was created in 1883 to oversee the construction and operation of all state-owned railways in Norway. On 1 December 1996, it was demerged to create the infrastructure operator Norwegian National Rail Administration, the train operator Norwegian State Railways and the Norwegian Railway Inspectorate. The name was taken by the train operator, although the infrastructure operator remained a government agency and is the legal successor.

Vygruppen, branded as Vy, formerly the Norwegian State Railways, is a government-owned railway company which operates most passenger train services and many bus services in Norway. The company is owned by the Norwegian Ministry of Transport. Its sub-brands include Vy Buss coach services, CargoNet freight trains and the Swedish train transport company Tågkompaniet. In 2009, NSB carried 52 million train passengers and 104 million bus passengers. On 24 April 2019, passenger train and bus services were rebranded as Vy.