Carl Nicolai Stoud Platou (25 July 1885 – 1 February 1956) was a Norwegian civil servant and politician. A jurist by education, he is best known for his civil servant career in the Norwegian Ministry of Justice and the Police, which spanned from 1911 to 1941. He was promoted to deputy under-secretary of state in 1926, but was dismissed and later incarcerated for listening to hostile radio in 1941, during the occupation of Norway by Nazi Germany. He returned after the war as Chief Minister of the Ministry of Justice and the Police in May 1945 and County Governor of Akershus and Oslo from 1945 to 1955. He had been involved in politics before the war as well, as deputy mayor of Aker.