| Named By: | Paul C. Sereno & Andrea B. Arcucci in 1994 |
| Time Period: | Late Triassic, 236-234 Ma |
| Location: | Argentina - Chanares Formation |
| Size: | About 40 centimetres long |
| Diet: | Carnivore/Piscivore |
| Fossil(s): | Partial post cranial skeleton |
| Classification: | | Chordata | Reptilia | Dinosauriformes | |
| Also known as: | | Lagosuchus lilloensis | |
Marasuchus (meaning "Mara crocodile") is a genus of basal dinosauriform archosaur which lived during the late Triassic in what is now La Rioja Province, Argentina.