George Amédée Tremblay (14 January 1911 – 14 July 1982) was a Canadian (and later, naturalized American citizen) pianist, composer, and author who was active in the United States. Although his works display a broad range of stylistic influences, he is primarily associated with the twelve-tone technique. He is the author of the musical treatise The Definitive Cycle of the Twelve Tone Row. Tremblay was also noted for his unique capacity to extemporize on the piano and frequently performed as an improviser.