The 2000 American Le Mans Series was the second running of the IMSA American Le Mans Series, and overall the 30th season of an IMSA GT Championship, dating back to the 1971 edition. It was a series for Le Mans Prototypes (LMP) and Grand Touring (GT) race cars divided into 3 classes: LMP, GTS, and GT. It began March 18, 2000 and ended December 31, 2000 after 12 races.
This season was the first time that the ALMS held races outside of North America, with two events held in Europe and one in Australia. These events helped with the creation of the 2001 European Le Mans Series season, although it was short-lived. An Asian Le Mans Series was also discussed but not developed.