Johannes Jahn (29 August 1885 – 10 July 1960) was a German trade unionist, politician and anti-Nazi activist.
By 1930, he was serving on the national executive of the United Union of German Railway Workers, and was an outspoken opponent of the Nazis.
This enabled him to set up a labour resistance group in the area, working closely with the International Transport Workers' Federation (ITF).
[1][3][2] At the end of World War II, Jahn returned to Germany, and was a leading figure in reconstructing the trade unions.
From 1956, he was president of the ITF, while from 1949 he served in the Bundestag, representing Hannover-Land II for the Social Democratic Party of Germany.