Wilhelm Ohnesorge (8 June 1872 – 1 February 1962) was a German politician in the Third Reich who sat in the Hitler Cabinet.

Along with his ministerial duties, Ohnesorge also significantly delved into research relating to propagation and promotion of the Nazi Party through the radio, and the development of a proposed German atomic bomb.

Born in Gräfenhainichen, in the Prussian Province of Saxony, Ohnesorge started working for the Imperial Post in 1890.

He later went on to study physics in Kiel and Berlin, before he became the head of the postal service in the Imperial Headquarters during World War I.

After the war, he became involved in right wing politics and joined the Deutschvölkischer Schutz- und Trutzbund, the largest, most active and most influential anti-Semitic organization in the Weimar Republic.