| Named By: | Rupert Wild in 1991 |
| Time Period: | 155-145 Ma Late Jurassic |
| Location: | Tanzania - Tendaguru Formation |
| Size: | Uncertain due to lack of remains, but size estimates have ranged from 15-24 meters long |
| Diet: | Herbivore |
| Fossil(s): | Partial post cranial remains including vertebrae and limb bones |
| Classification: | | Chordata | Reptilia | Dinosauria | Saurischia | Sauropodomorpha | Sauropoda | Titanosauria | |
Janenschia (named after Werner Janensch) was a large sauropod from Late Jurassic Tendaguru Formation of Tanzania, Africa (155 million years ago).