Chateau Neuf is a building in Oslo, Norway that houses the Norwegian Students' Society (Det Norske Studentersamfund) including cafes, bars, performance centers, and other facilities for student assembly.

It is situated at Slemdalsveien 15 near Majorstuen just south of the main campus of the University of Oslo at Blindern.

It also involves a pun on the French word neuf, which is pronounced like the Norwegian onomatopoeia for 'oink', alluding to the Student Society's personified patron and coat of arms symbol, "His Majesty the Pig" (Hans Majestet Grisen).

During the German occupation of Norway (1940–1945), the Student Society was dissolved due to oppositional attitudes to the occupying forces, and was re-established after the liberation in 1945.

[2] In the 1950s, funds were raised to build a new structure, spearheaded by Jan P. Syse (1930–1997).