| Named By: | Alick Walker in 1964 |
| Time Period: | Middle Jurassic, 160 Ma |
| Location: | England - Oxford Clay |
| Size: | Uncertain due to lack of remains, but comparison to similar theropod dinosaurs yields rough estimates of about 6 meters long for the holotype |
| Diet: | Carnivore |
| Fossil(s): | Partial post cranial remains |
| Classification: | | Chordata | Reptilia | Dinosauria | Saurischia | Theropoda | Allosauroidea | Sinraptoridae | Metriacanthosaurinae | |
| Also known as: | | Megalosaurus parkeri | Altispinax parkeri | |
Metriacanthosaurus (meaning "moderately-spined lizard") is a genus of metriacanthosaurid dinosaur from the upper Oxford Clay of England, dating to the mid-Jurassic Period, about 160 million years ago (lower Oxfordian).