Per Lasson Krohg (18 June 1889 – 3 March 1965) was a Norwegian artist. Per Krohg is most frequently associated with the mural he created for the United Nations Security Council Chamber, located in the United Nations building in New York City.
He was born in Åsgårdstrand as a son of painters Christian Krohg and Oda Krohg. The family lived in Paris when Per Krohg grew up. He early showed great artistic talent, and was a student first at his father from 1903 to 1907, and of Henri Matisse from 1909 to 1910. In the early years he worked as a newspaper illustrator and taught tango in Paris.
Per Krohg's work as an artist spanned over a wide field, from paper drawings, illustrations and posters to set design, sculpture and monumental paintings. He was a teacher at the National College of Art and Design from 1934, professor at the National Art Academy, 1946–58, director 1955–58. Among others, his students included artists Frithjof Tidemand-Johannessen and Tulla Blomberg Ranslet.
Per Krohg created the murals for the United Nations Security Council Chamber, located in the United Nations building in New York City. He adorned many other public buildings with large frescoes, including the Physics and Chemistry Buildings, at the University of Oslo and the Oslo City Hall. He is represented at the National Museum for Art and Skagens Museum.
In 1950 he received the King's Medal of Merit in gold, and 1955 he was appointed Commander of the Order of St. Olav. From 1936 he was a member of the Swedish Royal Academy of Fine Arts in Stockholm and in 1948 he was awarded the Prince Eugen Medal.
He was married twice. In 1915 he married textile artist Cécile Marie ("Lucy") Vidil (1891–1977). Their marriage was dissolved during 1934. He was married in 1934 to Ragnhild Helene Andersen (1908–1972). He was the father of Norwegian artist, Guy Krohg (1917–2002).
- Nergaard, Trygve Bilder av Per Krohg (Aschehoug. 2000) ISBN 82-03-22447-4
- Hölaas, O. Per Krohg. A retrospective loan exhibition of oil paintings (New York: Galerie St. Etienne, 1954)
- Langaard, Johan Per Krohg (Glendendal Norsk Forlat. 1931)
- Security Council Chamber painting
- 360 degree view of the Security Council Chamber
- Prins Eugen-medaljen
- Family genealogy