The 2012 International V8 Supercar Championship was an FIA-sanctioned international motor racing series for V8 Supercars. It was the fourteenth running of the V8 Supercar Championship Series and the sixteenth series in which V8 Supercars have contested the premier Australian touring car title. The championship began on 1 March at the Clipsal 500 and concluded on 2 December at the Homebush Street Circuit. The 53rd Australian Touring Car Championship title was awarded to the winner of the Drivers' Championship by the Confederation of Australian Motor Sport.

The Supercars Championship currently known as the Repco Supercars Championship under sponsorship, is a touring car racing category in Australia and New Zealand, running as an International Series under Fédération Internationale de l'Automobile (FIA) regulations, governing the sport.