John Thronsen (12 September 1913 – 24 May 2003[1]) was a Norwegian economist.
From 1933 he was a member of the party Nasjonal Samling (so were his brother Thorvald Thronsen, four other siblings, and both parents), and during the occupation of Norway by Nazi Germany a career path opened for him. In October 1940 he was appointed as national chief of finance in Nasjonal Samling.[2]
Thronsen was fired in April 1943. The reason was that a corruption case was filed against him, even though he was not found guilty of it. Thronsen claimed that the corruption case was a revenge from Karl Marthinsen and Jørgen Nordvik, whom Thronsen earlier had called out for stealing.[2]
During the legal purge in Norway after World War II he was convicted of treason, and sentenced to eight years of forced labour. He was released already in 1949.[2] He lived in Bærum in his later life.[3]