Max Volmer (; 3 May 1885 – 3 June 1965) was a German physical chemist, who made important contributions in electrochemistry, in particular on electrode kinetics.  He co-developed the Butler–Volmer equation. Volmer held the chair and directorship of the Physical Chemistry and Electrochemistry Institute of the Technische Hochschule Berlin, in Berlin-Charlottenburg. After World War II, he went to the Soviet Union, where he headed a design bureau for the production of heavy water.  Upon his return to East Germany ten years later, he became a professor at the Humboldt University of Berlin and was president of the East German Academy of Sciences.