Phyllodon (meaning "leaf tooth") was a genus of small ornithischian dinosaur from the Kimmeridgian-aged Upper Jurassic Camadas de Guimarota Formation of Leiria, Portugal and possibly also the Bathonian-aged Chipping Norton Limestone of England.

Phyllodon is based on MGSP G5, a partial lower jaw tooth recovered from a lignite marl in a mine near the city of Leiria.

Oliver Rauhut, who described the new material, tentatively identified the lower jaws as Phyllodon due to there being no other similar dinosaurs found at the locality.

He also found additional diagnostic characteristics for Phyllodon in the new material, including very tall upper jaw teeth, indicating that it could be a valid genus after all.

After comparing it to other hypsilophodonts, he found that it best matched the roughly contemporaneous Drinker of the North American Morrison Formation, with various details suggesting that they were closely related.