Marc Stephan Jongen (born May 23, 1968 in Merano, Italy) is a German politician (AfD).
From 2003 to 2017 he was a research assistant for philosophy at the Staatliche Hochschule für Gestaltung Karlsruhe.
Jongen is regarded as "party philosopher" of right-wing AfD, "chief ideologue" or "thought leader".
He was the chef of AfD Baden-Württemberg from March 2017 to February 2019 and has been Deputy State chef ever since.
In the 2017 federal election he got elected as member of Bundestag.