2005 Speedway Grand Prix of Great Britain

The 2005 Speedway Grand Prix of Great Britain was the fourth round of the 2005 Speedway Grand Prix season (the world championship). It took place on 11 June 2005 at the Millennium Stadium in Cardiff, Wales.

It was the 11th time that the Speedway Grand Prix of Great Britain had been held.

The Grand Prix was by the Swedish rider Tony Rickardsson (his 17th career Grand Prix win and third of the 2005 campaign).