| Named By: | Daniel Chure, Brooks Britt, John A. Whitlock & Jeffrey A. Wilson in 2010 |
| Time Period: | Early Cretaceous, 104.5 Ma |
| Location: | USA, Utah - Cedar Mountain Formation, Mussentuchit Member |
| Size: | Uncertain due to lack of remains, refer to summary for more detail |
| Diet: | Herbivore |
| Fossil(s): | Skulls and partial post cranial remains of several juvenile individuals. Holotype (DINO 16488) is of a complete skull and lower jaws with the first four cervical (neck) vertebrae |
| Classification: | | Chordata | Reptilia | Dinosauria | Saurischia | Sauropodomorpha | Sauropoda | Titanosauriformes | Brachiosauridae | |
Abydosaurus (meaning "Abydos lizard") is a genus of brachiosaurid sauropod dinosaur known from skull and postcranial material found in upper Lower Cretaceous rocks of northeastern Utah, United States.