Kurt Diebner (13 May 1905 – 13 July 1964) was a German nuclear physicist. During World War II, he was the administrative director of the German nuclear energy project. He was also director of the Nuclear Research Council and a Reich Planning Officer. Diebner was incarcerated in Britain after the war and repatriated back to Germany in early 1946. Shortly after his return, Diebner became a lecturer and businessman. He also wrote and published several works.