| Named By: | Sebastian Apestegula in 2007 |
| Time Period: | Early Cretaceous |
| Location: | Argentina. Neuquen Province - La Amarga Formation |
| Size: | Uncertain |
| Diet: | Herbivore |
| Fossil(s): | 6 caudal (tail) vertebrae, shoulder blade, femur and an astralgus (talos/ankle bone) |
| Classification: | | Chordata | Reptilia | Saurischia | Sauropodomorpha | Sauropoda | Titanosauria | |
Amargatitanis (meaning "Amarga giant") is a genus of dicraeosaurid sauropod dinosaur (a type of large, long-necked quadrupedal herbivorous dinosaur) from the Barremian-age (Lower Cretaceous) La Amarga Formation of Neuquen, Argentina.