Yuri Antónovich Mazurók (Russian Ю́рий Анто́нович Мазуро́к, 18 July 1931 in Kraśnik – 1 April 2006 in Moscow), PAU, was a Russian operatic baritone of Ukrainian ethnicity. He sang leading roles with major opera houses internationally, including the Bolshoi Theatre, where he made his debut as Eugene Onegin, to become his most famous part, in 1963, the Canadian Opera Company, the Metropolitan Opera (La traviata, Eugene Onegin, and Tosca), the Royal Opera, London, and the Vienna State Opera.