Selanikli Mehmed Nâzım Bey also known as Doktor Nazim (1870–1926) was a Turkish physician, politician, and theorist. He played a significant role in the Armenian genocide and the expulsion of Greeks in Western Anatolia. He was convicted of the attempted assassination of Atatürk in İzmir and hanged in Ankara on 26 August 1926. He also served as the chairman of the Turkish sports club Fenerbahçe S.K. between 1916 and 1918.