Races in calendar week 21/2005

All motorsport events on the weekend of 27–29 May 2005.

Circuit	Country	Series
Eastern Creek (Sydney)	Australia	Race results available (limited) V8 Supercar Championship 2005
Imola	Italy	Race results available (full) FIA GT Championship 2005 Race results available (full) FIA World Touringcar Championship 2005
Indianapolis (oval)	USA	Race results available (full) IRL IndyCar Series 2005 Race results available (full) IRL Infiniti Pro Series 2005
Nürburgring	Germany	Race results available (full) FIA Formula 1 World Championship 2005 Race results available (full) GP2 Series 2005 Race results available (full) Porsche Supercup 2005
Thruxton	Great Britain	Race results available (full) British Formula 3 Championship 2005