2004 Grand Prix motorcycle racing season

2004 World Champions
Valentino Rossi (pictured in 2005) became the MotoGP World Champion
Daniel Pedrosa became the 250cc World Champion
Andrea Dovizioso (pictured in 2010) became the 125cc World Champion

The 2004 Grand Prix motorcycle racing season was the 56th F.I.M. Road racing World Championship season. The season consisted of 16 races, beginning with the South African motorcycle Grand Prix on 18 April 2004 and ending with the Valencian Community motorcycle Grand Prix on 31 October.