Milorad Mažić (Serbian Cyrillic: Милорад Мажић; is an international referee.

He became a FIFA referee in 2009. His motto is: "You can't please everyone". He has been selected as a referee for the 2014 FIFA World Cup.

Having successfully refereed the round-of-16 return leg in March 2015 between Borussia Dortmund and Juventus, Mažić got another important Champions League assignment in April with the quarter-final first leg between Atlético Madrid and Real Madrid at the Vicente Calderón Stadium, a Madrid Derby match and a repeat of the previous season's Champions League final. The match ended 0-0. Among the five yellow-carded players were Real's left back Marcelo and Atlético's midfielder Mario Suárez whose bookings meant they had to miss the return leg due to the accumulation of yellow cards throughout the competition. In their post-match comments, both players had complaints about the way Mažić refereed the contest with Suárez going as far as questioning the referee's competence and apparently tying it to his ethnicity, saying on Spanish TV: "The referee is very bad. They can't use a Serbian referee for these type of games, with all my respect. I hope that in the return leg they pick a better referee". With the possibility of matches being added to his one-game suspension due to his comments that were taken by some as an ethnic slur, Suárez took to Twitter in order to apologize, tweeeting: "I'd like to apologize if anyone has been offended by my words after the game, it was not my intention. I meant to say that games of this magnitude should be given to a referee from one of the big leagues. Nothing more, we all make mistakes. Lets keep working". The following day, Atlético's centre back Miranda backed his teammate Suárez, continuing to question Mažić's competence due to having a background from the Serbian SuperLiga: "I won't talk about the referee, but I think referees from minor leagues should not be in charge of this kind of game".

Mažić refereed the Europa League semi-final return leg in mid May, his third time being involved in a match at this stage of competition, between Dnipro and Napoli that was played in Kiev instead of Dnipropetrovsk due to the Ukrainian conflict.

In July 2015 Mažić got hired by the Egyptian FA to referee the country's biggest league derby between Cairo cross-town rivals Al Ahly and Zamalek. The match from the finish of the Egyptian Premier League is to be played on 22 July 2015 in a neutral venue in Alexandria without a crowd.