Races in calendar week 20/2005

All motorsport events on the weekend of 20–22 May 2005.

Circuit	Country	Series
Dunfermline (Knockhill)	Great Britain	Race results available (full) British Formula 3 Championship 2005
Hockenheim	Germany	Race results available (full) German Formula-3-Cup 2005
Lexington	USA	Race results available (full) American LeMans Series 2005
Mont-Tremblant	Canada	Race results available (full) Grand-Am Sports Car Series 2005
Monte Carlo	Monaco	Race results available (full) FIA Formula 1 World Championship 2005 Race results available (full) GP2 Series 2005 Race results available (full) Formula Renault 3.5 World Series 2005 Race results available (full) Formula 3 Euroseries 2005 Race results available (full) Porsche Supercup 2005
Monterrey (Fundidora Park)	Mexico	Race results available (full) OWRS ChampCar World Series 2005 Race results available (full) Formula Toyota Atlantic 2005
Phillip Island	Australia	Race results available (full) Formula 4000 by Holden 2005 Race results available (full) Australian Formula 3 Championship Series 2005