The 2008 American Le Mans Series season was the 38th season for the IMSA GT Championship, with the tenth season known as the American Le Mans Series. It was a series for Le Mans Prototypes (LMP) and Grand Tourer (GT) race cars divided into four classes: LMP1, LMP2, GT1, and GT2. It began March 15 and ended October 18 after eleven races.
The Audi Sport North America team wrapped up its title defence of LMP1 class Teams Championship with three races in hand after the Sports Car Challenge of Mid-Ohio in August. Drivers Marco Werner and Lucas Luhr also secured the Drivers Championship after the Detroit Sports Car Challenge. It was a record fifth ALMS drivers title for Luhr and a fourth for Werner.
The Petit Le Mans saw the drivers title for GT1 decided with Jan Magnussen and Johnny O'Connell taking the title while Jörg Bergmeister and Wolf Henzler likewise secured the GT2 drivers championship. It was O'Connell's fourth GT1 title and Bergmeisters third GT2 title.