Gerhard Georg Bernhard Ritter (6 April 1888, in Bad Sooden-Allendorf – 1 July 1967, in Freiburg) was a nationalist-conservative German historian, who served as a professor of history at the University of Freiburg from 1925 to 1956. He studied under Professor Hermann Oncken. A Lutheran, he first became well known for his 1925 biography of Martin Luther and hagiographic portrayal of Prussia. A member of the German People's Party during the Weimar Republic, he was a lifelong monarchist and remained sympathetic to the political system of the defunct German Empire.