 The Gjøvik Line (Norwegian: Gjøvikbanen) is a 123-kilometre (76 mi) railway line between Oslo Central Station and Gjøvik Station. Originally named the North Line, the first section from Grefsen to Røykenvik opened on 20 December 1900. On 28 November 1902, the section from Grefsen to Oslo S and from Jaren to Gjøvik opened. The section from Jaren to Røykenvik then became the branch Røykenvik Line. The line was electrified at 15 kV 16 2 ⁄ 3 Hz AC north to Jaren in 1961, and to Gjøvik two years later. At the same time, the section from Oslo S to Grefsen was rebuilt to double track. The rest of the line remains single track. There are 21 stations on the line, all served by NSB Gjøvikbanen. The southern part of the line, from Oslo to Roa, is also used by freight trains, who branch off on the Roa – Hønefoss Line to connect to the Bergen Line.
