The 2009 V8 Supercar Championship Series was the eleventh V8 Supercar Championship Series and the thirteenth series in which V8 Supercars have contested the premier Australian touring car title. It began on 19 March at the Clipsal 500 on the streets of Adelaide and ended on 6 December at the Homebush Street Circuit and consisted of 26 races over 14 events which were held in all states and the Northern Territory of Australia as well as New Zealand. The 50th Australian Touring Car Championship title was awarded to the winner of the series by the Confederation of Australian Motor Sport.
Triple Eight Race Engineering Ford driver Jamie Whincup won the Championship from Holden drivers Will Davison and Garth Tander. Championship races were also won by Craig Lowndes, Michael Caruso, James Courtney and Mark Winterbottom. The two-driver endurance races, held at the Phillip Island Grand Prix Circuit and at the Mount Panorama Circuit, Bathurst, were both won by Tander and Davison.