Michael Maddox (1747–1822; Russian: Михаил Егорович Маддокс, Mikhail Yegorovich Maddox, also spelled Medoks, Maddocks, Mattocks) was an English entrepreneur and theatre manager active in Imperial Russia. He was co-founder, with Prince Urusov, of the Petrovsky Theatre, the first permanent opera theatre in Moscow and predecessor of the Bolshoi Theatre.