Jean Hjalmar Dahl Heiberg (19 December 1884 – 27 May 1976) was a Norwegian painter, sculptor, designer and art professor.

He studied at the Royal Drawing School (Den Kongelige Tegneskole) in Kristiania from 1903 to 1904, and in Munich from 1904 to 1905.

[1] Among Heiberg's paintings are Boksekamp from 1910 and Enken from 1915, which are both located in National Gallery of Norway.

[3] [4] [5] [6] [7] Heiberg was appointed a professor at the Norwegian National Academy of Fine Arts from 1935 to 1955,[2] except during the occupation of Norway by Nazi Germany, when he was fired in 1941.

[1] In autumn 1941 he started secretly running an undercover art academy in Oslo, together with fellow professor Axel Revold.

It was later located at Lauritz Falk's home and at Johannes Sejersted Bødtker's atelier at Holmenkollen.