Knut Berg (4 August 1925 – 29 November 2007) was a Norwegian art historian and museologist.
He was born in Oslo to Arno Berg and Signe Mowinckel Larsen.
Berg was assigned with the National Gallery of Norway for thirty years, and served as director of the museum for 22 years, from 1973 to 1995.
His works include the 7-volume Norges kunsthistorie (principal editor and contributor) and Norges malerkunst (1993), and he was project leader for Norsk Kunstnerleksikon, jointly with Stephan Tschudi-Madsen.