Johan Collett Müller Borgen (28 April 1902 – 16 October 1979) was a Norwegian author, journalist and critic. His best-known work is the novel Lillelord for which he was awarded the Norwegian Critics Prize for Literature in 1955.  
He was born in Kristiania (now Oslo), Norway. He was the son of Poul Holst Borgen (1867–1941) and Andrea Elfrida Bommen (1868–1958). He was raised in the borough of Frogner as the youngest of four sons in the family of a successful attorney. He attended private schools; first at Frøenene Platous Forskole, then at Frogner Skole. He graduated artium in 1920. In 1923, Borgen received a part-time position as a journalist at Dagbladet. He started his column which featured a series of ironic and satirical articles writing under the pseudonym "Mumle Gåsegg". He was employed by Dagbladet from 1923-41 and by Morgenbladet from 1928-30. During the 1930s, he also translated books from different languages within a variety of genres.
During the Occupation of Norway by Nazi Germany, he wrote a series of ironic, derogatory articles about the Nazi regime. Eventually he was arrested and sent to Grini concentration camp. He later escaped and continued to write against the occupation power. His illegal work was quickly rediscovered and he had to escape across the border with Sweden. After the liberation of Norway in 1945, he was a short-time editor of culture in the newspaper Friheten. During the period 1947-59, he worked as a stage instructor in Oslo and instructed over forty performances. Borgen was editor of the literary magazine Vinduet 1954-1959.
In 1925, he debuted as a fictional author with the collection of novel Mot mørket. With the novel collection Hvetebrødsdager (1948), Borgen received his great artistic breakthrough, and he followed up with Noveller om kjærlighet (1952) and Natt og dag (1954). His semi-autobiographical novel Lillelord (1955) is his most famous book. Lillelord is the first book in the trilogy that also includes De mørke kilder and Vi har ham nå published in 1956 and 1957. 
- 1945 Gyldendal's Endowment
- 1955 Norwegian Critics Prize for Literature
- 1965 Dobloug Prize
- 1965 Bokhandlerprisen for Lillelord
- 1967 Nordic Council's Literature Prize
- "Borgen, Johan". NRK. Retrieved April 1, 2018.
- "Kritikerprisen". Kritikerlaget. Retrieved April 1, 2018.
- Erik Bjerck Hagen. "Johan Borgen". Store norske leksikon. Retrieved April 1, 2018.
- "Mumle Gåsegg". Allkunne. Retrieved April 1, 2018.
- "Lillelord-trilogien". Gyldendal. Retrieved April 1, 2018.
- "Johan Borgen (1902-1979)". Gyldendal. Retrieved April 1, 2018.
- Erik Bjerck Hagen. "Brett Borgen". Store norske leksikon. Retrieved April 1, 2018.
- Erik Bjerck Hagen. "Annemarta Borgen". Store norske leksikon. Retrieved April 1, 2018.