Thilo Marauhn (born April 30, 1963, Lüdenscheid, West Germany) is a German expert on international law.
He currently holds the professorship for Public Law and International Law at the Justus Liebig University Giessen and heads the research group “International Law” at the Leibniz Institute Hessische Stiftung Friedens- und Konfliktforschung / Peace Research Institute Frankfurt (PRIF).