| Named By: | L. P. Tatarinov in 2005 |
| Time Period: | Middle Triassic |
| Location: | Kyrgyzstan - Madygen Formation |
| Size: | Unavailable |
| Diet: | Uncertain |
| Fossil(s): | Partial remains |
| Classification: | | Chordata | Synapsida | Therapsida | Cynodontia | |
Madysaurus is an extinct genus of cynodont which existed in Kyrgyzstan. It was first named by Leonid Petrovich Tatarinov in 2005. Madysaurus is known from the Madygen Formation, a Triassic Lagerstatte that also includes well-preserved remains of insects and small reptiles like Sharovipteryx and Longisquama. Madysaurus is one of the most primitive cynodonts and is placed in its own family, Madysauridae.