Adam Schaff (10 March 1913, Lwów – 12 November 2006, Warsaw) was a Polish Marxist philosopher.
Of Jewish origin, Schaff was born in Lwów into a lawyer's family. Schaff studied economics at the Ecole des Sciences Politiques et Economiques in Paris, and philosophy in Poland, specializing in epistemology. In 1945 he received a philosophy degree at Moscow University, and in 1948 he returned to Warsaw University. He was considered the official ideologue of the Polish United Workers' Party. He was a member of the Polish Academy of Sciences and of the Club of Rome.