Peter W. Marx (born 1973 in Limburg an der Lahn) is a German Theatre and Performance studies Scholar. He is the chairperson of Theatre and Media Studies at the University of Cologne where he is the director of its Theaterwissenschaftliche Sammlung as well.
Marx is recognized for his research on metropolitan culture at the beginning of the 20th century as well as on Max Reinhardt with an emphasis on Cultural Studies. In addition, his work focuses on contemporary theatre and Shakespeare in performance, particularly on "Hamlet" as a figure of cultural mobility.