Majorstuen or Majorstua is a particularly affluent neighbourhood in the Frogner borough in the inner part of Oslo, Norway.
Majorstuen is known for its vibrant downtown and especially its shopping area. The area has several elegant townhouses c. 1880–1890. The area is also an important public transport junction in Oslo, where all metro lines, three tram lines and five bus lines operate. It is served by Majorstuen station.