| Named By: | Calvo & Riga in 2003 |
| Time Period: | Late Cretaceous |
| Location: | Argentina, Neuquen Province - Neuquen Formation |
| Size: | Estimated about 11 meters long |
| Diet: | Herbivore |
| Fossil(s): | Partial post cranial remains and a fragment of a skull |
| Classification: | | Chordata | Reptilia | Dinosauria | Saurischia | Sauropodomorpha | Sauropoda | Titanosauria | |
Rinconsaurus is a genus of dinosaur from the Late Cretaceous. It was a titanosaurid sauropod which lived in what is now Argentina. The type species, Rinconsaurus caudamirus, was described by Calvo and Riga in 2003, and is based on three partial skeletons.