| Named By: | R. A. Coria in 2001 |
| Time Period: | Late Cretaceous, Campanian-Maastrichtian |
| Location: | Argentina - Allen Formation |
| Size: | Tibia about 52.9 centimetres long, preserved length of femur 35 centimetres (upper portion of femur is missing). Total body size uncertain due to lack of remains but roughly estimated to be about 4.5 meters long |
| Diet: | Carnivore |
| Fossil(s): | Right tibia (lower leg bone) and a partial lower portion of the right femur (upper leg bone) |
| Classification: | | Chordata | Reptilia | Dinosauria | Saurischia | Theropoda | Abelisauridae | Carnotaurini | |
Quilmesaurus is a genus of carnivorous theropod dinosaur from the Patagonian Upper Cretaceous (Campanian stage) of Argentina.