| Named By: | Jose Bonaparte & Rodolfo Coria in 1993 |
| Time Period: | Late Cretaceous, 97-93.5 Ma |
| Location: | Argentina, Huincul Formation |
| Size: | Incomplete material makes sizing difficult. Estimates range from 22 -35 meters long |
| Diet: | unavailable |
| Fossil(s): | Only a few bones including, vertebrae, sacrum, ribs and right tibia |
| Classification: | | Chordata | Reptilia | Dinosauria | Saurischia | Sauropoda | Titanosauria | Antarctosauridae | |
Argentinosaurus (meaning "Argentine lizard") is a genus of titanosaur sauropod dinosaur first discovered by Guillermo Heredia in Argentina. The generic name refers to the country in which it was discovered. The dinosaur lived on the then-island continent of South America somewhere between 97 and 93.5 million years ago, during the Late Cretaceous Period. It is among the largest known dinosaurs.