Jakob Kaiser (8 February 1888 – 7 May 1961) was a German politician and resistance leader during World War II.

It was during this time that he became politically active as a member of a Catholic trade union, through which he became a leader of the Christian labour movement during the Weimar Republic.

[1] Kaiser increased his participation in politics by becoming a member of the Centre Party, where he began serving in the role of representative chairman of Rhineland in 1919.

[4] Through his participation in the Cologne-resistance circle, Kaiser became a close associate of the former Mayor of Leipzig, Carl Goerdeler.

Although he was not directly informed of the 20 July Plot, his knowledge of Stauffenberg's intention to assassinate Hitler as well as his close ties to the resistance group forced him to go into hiding for the remainder of World War II.

[6] After the war, Kaiser returned to politics and worked with Andreas Hermes to found the East Berlin division of the Christian Democratic Union (CDU).

Kaiser disagreed with Adenauer's social market economy and called for the nationalisation of key industries.