| Named By: | J. J. Flynn, J. M. Parrish, B. Rakotosamimanana, L. Ranivoharimanana, W. F. Simpson & A. R. Wyss in 2000 |
| Time Period: | Middle to Late Triassic |
| Location: | Brazil - Santa Maria Formation. Madagascar - Makay Formation |
| Size: | Skull roughly about 17 centimetres long |
| Diet: | Herbivore |
| Fossil(s): | Partial remains of few individuals, mostly of skull material |
| Classification: | | Chordata | Synapsida | Therapsida | Cynodontia | Gomphodontia | Traversodontidae | Gomphodontosuchinae | |
Menadon is an extinct genus of synapsid which existed in Madagascar during the middle to late Triassic period. The type species is Menadon besairiei.
Recent research has shown the existence of Menadon besairiei in Paleorrota geopark in the city of Santa Cruz do Sul, state of Rio Grande do Sul, Brazil.