| Named By: | Hu in 1973 |
| Time Period: | Late Cretaceous, Middle to Late Campanian |
| Location: | China - Shandong Peninsula - Wangshi Formation |
| Size: | Largest individuals approaching up to 15 meters long |
| Diet: | Herbivore |
| Fossil(s): | Partial remains of many individuals allowing for composite reconstructions |
| Classification: | | Chordata | Reptilia | Dinosauria | Ornithischia | Ornithopoda | Hadrosauridae | Saurolophinae | |
| Also known as: | | Zhuchengosaurus maximus | |
Shantungosaurus, meaning "Shandong Lizard", is a genus of saurolophine hadrosaurid dinosaurs found in the Late Cretaceous Wangshi Group of the Shandong Peninsula in China. The stratigraphic interval of Shantungosaurus ranges from the top of the Xingezhuang Formation to the middle of the Hongtuya Formation, middle to late Campanian in age. Shantungosaurus is so far the largest hadrosauroid taxon in the world: the greatest length of its femur is about 1.7 m, and the greatest length of its humerus is about 0.97 m.