Leo von Jena, also called Leo Ferdinand von Jena (born July 8, 1876, in Biebrich am Rhein - died April 7, 1957, in Celle) was a German military officer who became a SS General during World War II and commander of the Waffen SS in Berlin. Von Jena joined the German National People's Party and the SA-Sturmabteilung in 1921. He join the Nazi Party in 1936. On November 9, 1936, he joined the SS-Schutzstaffel and Heinrich Himmler personally accepted him as an honorary SS-Sturmbannfuhrer, where he rose through the SS ranks. On March 30, 1941, he was promoted to SS Brigadefuhrer of the Waffen SS. On January 30, 1944, he was promoted to SS Obergruppenfuhrer of the Allgemeine SS and Lieutenant General (Generalleutnant) in the Waffen-SS.