The 2006 American Le Mans Series season was the 36th season for the IMSA GT Championship, with the eighth as the American Le Mans Series. It was a series for Le Mans Prototypes (LMP) and Grand Touring (GT) race cars divided into 4 classes: LMP1, LMP2, GT1, and GT2. It began March 18, 2006, and ended October 21, 2006 after 10 races.