Races in calendar week 21/2004

All motorsport events on the weekend of 21–23 May 2004.

Circuit	Country	Series
Assen	Netherlands	Race results available (full) German Formula-3-Cup 2004
Indianapolis (oval)	USA	Race results available (full) IRL Infiniti Pro Series 2004
Jarama	Spain	Race results available (full) Spanish Formula 3 Championship 2004
Magny-Cours	France	Race results available (full) Formula Nissan V6 World Series 2004 Race results available (full) World Series Light 2004
Mont-Tremblant	Canada	Race results available (full) Grand-Am Sports Car Series 2004
Monte Carlo	Monaco	Race results available (full) FIA Formula 1 World Championship 2004 Race results available (full) FIA Formula 3000 Int. Championship 2004 Race results available (full) Formula Renault V6 Eurocup 2004 Race results available (full) Porsche Supercup 2004
Monterrey (Fundidora Park)	Mexico	Race results available (full) OWRS ChampCar World Series 2004 Race results available (full) Formula Toyota Atlantic 2004
Sugo	Japan	Race results available (full) All-Japan GT Championship 2004
Viamao (Taruma)	Brazil	Race results available (full) South American Formula 3 Championship 2004