Manfred Ackermann (1 November 1898 – 16 June 1991) was an Austrian Social Democratic politician and trade union official in Austria and the United States. Ackermann served in the Austrian forces during World War I. After returning to civilian life, he became involved in trade union activities and the Sozialdemokratische Arbeiterpartei (SDAP). The SDAP was banned in the 1930s, and Ackermann was arrested in March 1934, after the Austrian Civil War, and held until summer, 1935 in Wöllersdorf detention camp. He was re-arrested in November 1937 as a result of working illegally and held until Schusc