1991 Australian Endurance Championship

The 1991 Australian Endurance Championship was a CAMS sanctioned Australian motor racing title open to Group 3A Touring Cars. The championship, which was the eighth running of the Australian Endurance Championship, began on 8 September 1991 at Sandown Raceway and ended on 6 October at the Mount Panorama Circuit after two rounds. The title was won by Mark Gibbs and Rohan Onslow who shared a Bob Forbes Racing Nissan Skyline GT-R. The 1991 Australian Manufacturers' Championship, which was run concurrently with the Endurance Championship, was awarded to the Nissan Motor Co (Australia).