Leo Kofler (also known by the pseudonyms Stanislaw Warynski or Jules Dévérité; 26 April 1907 – 29 July 1995) was an Austrian-German Marxist sociologist.
He ranks with the Marburg politicologist Wolfgang Abendroth and the Frankfurt school theoreticians Max Horkheimer and Theodor W. Adorno among the few well-known Marxist intellectuals in post-war Germany.
In July 1938, after the annexation of Austria by Nazi Germany, he escaped to Basel, Switzerland where he was interned in an immigrant camp.
In September 1947 he moved to the Soviet-occupied zone of Germany, and in 1948 became lecturer in medieval and modern history at the University of Halle.
At the end of 1950, he escaped with his future wife Ursula Wieck to Cologne in West Germany, and worked there as well as in Dortmund and Bochum as lecturer and researcher, publishing a stream of books and articles.