Gerhard Mayer is a male discus thrower from Austria.

The men's discus throw event at the 2008 Summer Olympics took place on 16–19 August at the Beijing National Stadium. Thirty-seven athletes from 29 nations competed. The event was won by Gerd Kanter of Estonia, the nation's first victory in the men's discus throw. Piotr Małachowski took silver to give Poland its first medal in the event. Lithuanian thrower Virgilijus Alekna's bronze made him the third man to win three medals in the sport, adding to his gold medals from 2000 and 2004.