Judith Auer (née Vallentin) (19 September 1905 – 27 October 1944) was a Swiss resistance fighter against the Nazi régime in Germany.

[2] In 1924, as a student, she joined the Young Communist League of Germany,[1] and the next year, moved to Berlin.

There, she met and married Erich Auer, a functionary in the Communist Party of Germany (KPD), in 1926.

[2] To earn money, Auer learned typing and shorthand and took a job at a KPD establishment.

[2] It was here that Auer first came into contact with the resistance group around Fritz Plön,[2] a welder, who himself had contacts with the resistance group around Anton Saefkow, Franz Jacob, Bernhard Bästlein and Karl Klodt, the Saefkow-Jacob-Bästlein Organization.