| Named By: | Kristina Currie Rogers and Catherine A. Forster in 2001 |
| Time Period: | Late Cretaceous, 70 Ma |
| Location: | Madagascar, Maevarano Formation |
| Size: | Possibly up to 15 meters long |
| Diet: | unavailable |
| Fossil(s): | One juvenile skeleton, partial remains from other individuals |
| Classification: | | Chordata | Reptilia | Dinosauria | Saurischia | Sauropodomorpha | Sauropoda | Titanosauria | Nemegtosauridae | |
Rapetosaurus ( ra-PAY-too-SAW-ras) is a genus of sauropod dinosaur that lived in Madagascar from 70 to 66 million years ago, at the end of the Cretaceous Period. Only one species, Rapetosaurus krausei, has been identified.
Like other sauropods, Rapetosaurus was a quadrupedal herbivore; it is calculated to have reached lengths of 15 metres (49 ft).