Abelisaurus (; "Abel's lizard") is a genus of predatory abelisaurid theropod dinosaur during the Late Cretaceous Period (Campanian) of what is now South America. It was a bipedal carnivore that probably reached 7 to 9 meters (23 to 30 feet) in length, although this is uncertain as it is known from only one partial skull.

Abelisaurus (; "Abel's lizard") is a genus of predatory abelisaurid theropod dinosaur during the Late Cretaceous Period (Campanian) of what is now South America. It was a bipedal carnivore that probably reached 7 to 9 meters (23 to 30 feet) in length, although this is uncertain as it is known from only one partial skull.