Ali Mazaheri (Persian: علی مظاهری; born March 31, 1982, in Kermanshah, Iran) is an amateur boxer from Iran, who competed in the 2006 Asian Games in the Heavyweight (-91 kg) division and won the gold medal in the final bout against Uzbekistan's Jasur Matchanov 25–19. Mazaheri won the gold medal of the 2007 Ulan Bator in the Heavyweight (-91 kg) division. At the Ahmed Öner Cup the southpaw beat Emad Abdelhalim Ali and Denis Poyatsika. At the 2007 World Amateur Boxing Championships he was upset early against Milorad Gajovic (Montenegro). At the 2010 Asian Games he lost to Syria's Mohammad Ghossoun.