Yuri Antonovich Mazurok was a Soviet and Russian operatic baritone of Polish 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, the Royal Opera, London, and the Vienna State Opera.
Among Mazurok's recordings are Eugene Onegin, and Il trovatore. On DVD can be found a 1983 Bolshoi production of The Queen of Spades, with Atlantov, Milashkina, and Elena Obraztsova. On a 9 December 1978 DVD, Mazurok sings Escamillo in a production of Carmen at the Wiener Statsoper with Elena Obraztsova, Plácido Domingo, and Isobel Buchanan, conducted by Carlos Kleiber and directed by Franco Zeffirelli.