John Gudenus (born 23 November 1940 in Vienna) is an Austrian retired member of the Federal Council of Austria on a free mandate (formerly as a member of the Freedom Party of Austria), and colonel of the Austrian Bundesheer.
In 2006, Gudenus received a one-year suspended sentence for breaking the Verbotsgesetz, Austria's laws against denying or diminishing the Holocaust. Gudenus had suggested that it was necessary to verify the existence of gas chambers in the Third Reich and later remarked that there had been gas chambers in Poland but not in the Third Reich.
- Art 2006, p. 140
- "Holocaust denier". European press review (BBC News). 2006-04-27.
- Art, David (2006). The Politics of the Nazi Past in Germany and Austria. Cambridge University Press. ISBN 978-0-521-85683-6.