| Named By: | Richard Owen in 1884 |
| Time Period: | Early Jurassic |
| Location: | South Africa - Elliot Formation. Lesotho - Elliot Formation |
| Size: | About 30 centimetres long |
| Diet: | Herbivore |
| Fossil(s): | Several individuals |
| Classification: | | Chordata | Synapsida | Therapsida | Cynodontia | Tritylodontidae | |
| Also known as: | | Triglyphus | |
Tritylodon (Greek for 3 cusped tooth) was a genus of tritylodont, one of the most advanced group of cynodont therapsids. They lived in the Early Jurassic and possibly Late Triassic periods along with dinosaurs. They also shared a lot of characteristics with mammals, and were once considered mammals because of overall skeleton construction. That was changed due to them retaining the vestigial reptilian jawbones and a different skull structure. Tritylodons are now regarded as non-mammalian synapsids.