The 2005 Silverstone GP2 Series round was a GP2 Series motor race held on 9 and 10 July 2005 at Silverstone Circuit, United Kingdom.

It was the sixth round of the 2005 GP2 Series season.

The race weekend supported the 2005 British Grand Prix.

The feature race podium was completed by championship leader Heikki Kovalainen, of Arden International, and Rosberg's ART Grand Prix teammate Alexandre Prémat.

[1] Olivier Pla, who was on reverse grid pole after finishing eighth in the feature race, took his and DPR's first win of the season, ahead of iSport's Scott Speed and Kovalainen.