Owen's chameleon (Trioceros oweni), also commonly known as Owen's three-horned chameleon, is a species of chameleon in the family Chamaeleonidae. The species is native to sub-Saharan Africa. Named after British naval officer and explorer William Fitzwilliam Owen, it was first described in 1831 by the naturalist John Edward Gray, and is the type species of the genus Trioceros.