| Named By: | Sereno, Forster, Rogers & Monetta in 1993 |
| Time Period: | Late Triassic, 231-228 Ma |
| Location: | Argentina - Ischigualasto Formation |
| Size: | 1 meter long |
| Diet: | Possibly an omnivore |
| Fossil(s): | Many specimens, some of which are very well preserved |
| Classification: | | Chordata | Reptilia | Dinosauria | Saurischia | Eusaurischia | |
Eoraptor (pron.: UK, AU, NZ /'i.orapta/; US, CAN /'i.oraepta/) was one of the earliest known dinosaurs, living approximately 231 to 228 million years ago, during the Late Triassic in Western Gondwana, in the region that is now northwestern Argentina. It was a small, lightly-built, basal theropod dinosaur. It is known from several well-preserved skeletons. When first described in 1993, it was considered to be one of the earliest, if not the earliest known dinosaur. Eoraptor has heterodont dentition, suggesting that it was omnivorous, and that this feeding strategy had evolved early on in dinosaurs.