Gyula Sax (Hungarian: Sax Gyula, born June 18, 1951) is a Hungarian chess player and International Arbiter (1995), born in Budapest. He was awarded the IM title in 1972 and the GM title in 1974. He was the Hungarian Chess Champion in 1976 and 1977 (jointly). In 1971-72, he was the European Junior Champion, and he placed first at Rovinj-Zagreb 1975, Vinkovci 1976, Las Palmas 1978 and Amsterdam 1979. He won the 1978 Canadian Open Chess Championship. He participated in the Candidates Tournament after qualifying at the Subotica Interzonal in 1987, but was eliminated by Nigel Short (+0=3−2). His highest Elo rating was 2610.