| Named By: | C. inC. Young in 1937 |
| Time Period: | Late Jurassic |
| Location: | China, Xinjian |
| Size: | Estimated about 12 meters long |
| Diet: | Herbivore |
| Fossil(s): | Partial post cranial remains and an egg |
| Classification: | | Chordata | Reptilia | Dinosauria | Saurischia | Sauropoda | Eusauropoda | Mamenchisauridae | |
Tienshanosaurus (meaning "Tienshan lizard") is a genus of dinosaur from the Late Jurassic. It was a sauropod which lived in what is now China.