| Named By: | C.inC. Young in 1982 |
| Time Period: | Sinemurian 195.5-189.6 Ma |
| Location: | China, Yunnan Province - Lufeng Formation |
| Size: | Unknown due to lack of remains |
| Diet: | Uncertain |
| Fossil(s): | Partial remains |
| Classification: | | Chordata | Reptilia | Archosauromorpha | Crocodylomorpha | Mesoeucrocodylia | |
Dianchungosaurus is an extinct genus of mesoeucrocodylian crocodylomorph from the Early Jurassic of China. It was previously considered a dinosaur, but it was recently reclassified as a mesoeucrocodylian by Paul Barrett and Xing Xu (2005). It is probably the same animal as the informally named "Tianchungosaurus".
The type species is D. lufengensis.