| Named By: | H. Saegusa & T. Ikeda in 2014 |
| Time Period: | Early Cretaceous |
| Location: | Japan, Hyogo Prefecture - Sasayama Group |
| Size: | Unavailable |
| Diet: | Herbivore |
| Fossil(s): | Braincase and partial post cranial skeletal remains |
| Classification: | | Chordata | Reptilia | Dinosauria | Saurischia | Sauropoda | Macronaria | |
Tambatitanis is an extinct genus of titanosauriform dinosaur from the Early Cretaceous (Albian) of Japan. It is known from a single type species, Tambatitanis amicitiae. It was probably around 13 meters long and its mass was estimated at some 15 tonnes.