The 2001 American Le Mans Series season was the third season for the IMSA American Le Mans Series, and the 31st overall season of the IMSA GT Championship. It was a series for Le Mans Prototypes (LMP) and Grand Touring (GT) race cars divided into 4 classes: LMP900, LMP675, GTS, and GT. It began March 4, 2001 and ended October 6, 2001 after 10 races. This season shared events with the new European Le Mans Series, with two events being held in Europe.