2009 British GT season

The 2009 Avon Tyres British GT season was the 17th season of the British GT Championship. The season began at Oulton Park's Easter Monday meeting, and finished on September 20 at Brands Hatch after 14 races. 2009 saw the debut of the new Supersport class. Twins David and Godfrey Jones won the GT3 title during the final race of the season. Jody Firth sealed the GT4 title, while Phil Keen and Marcus Clutton won the Supersports Class.

Points are awarded to the top eight finishers in the order 10-8-6-5-4-3-2-1. Drivers in bold indicate pole position. Drivers in italics indicate fastest lap.