| Named By: | Eric Buffetaut & Varavudh Suteethorn in 2011 |
| Time Period: | Early Cretaceous, Aptian |
| Location: | Thailand, Nakhon Ratchasima Province - Khok Kruat Formation |
| Size: | Unknown due to lack of remains |
| Diet: | Herbivore |
| Fossil(s): | Left maxilla (one of the tooth bearing bones of the upper jaw), and tooth |
| Classification: | | Chordata | Reptilia | Dinosauria | Ornithischia | Ornithopoda | Iguanodontia | |
Siamodon is an extinct genus of iguanodontian ornithopod dinosaur from Early Cretaceous deposits of northeastern Thailand.