Helmuth Friedrichs (born 22 September 1899 in Otterndorf – died probably February 1945) was a German Nazi Party official. He was an important figure in the Office of the Deputy Führer and its successor the Nazi Party Chancellery.
After secondary school Friedrichs enlisted in the German Imperial Army in 1916, seeing service in the First World War. Serving on both fronts, he was captured by the British in October 1918 and held as a prisoner of war until the end of 1919. Serving with the Freikorps and the army, he joined with Karl Dincklage, later a Sturmabteilung (SA) leader, in campaigning for the German National People's Party. He also worked as a miner in Westphalia and studied at the Mining Academy in Clausthal-Zellerfeld without graduating. He was nicknamed "Long Friedrichs" on account of his height.
He joined the Nazi Party in 1929 the SA in turn of the year 1929/1930 and the Schutzstaffel in 1936. He reached the rank of Gruppenführer in the SS in 1944. He also served as a member of the Reichstag for Hessen-Nassau during the Third Reich.
Freidrichs was serving as head of organisation in Gau Essen in March 1934 when Rudolf Hess appointed him to his staff as head of the "party division". In this role he served as liaison between Hess and Martin Bormann, meeting the former weekly to obtain his general policy ideas before passing these on to Bormann who then developed specific initiative based upon Hess's initial ideas.Heinrich Walkenhorst served as his deputy, with both men remaining in office until 1945.