Trioceros ellioti, also known commonly as Elliot´s chameleon, Elliot´s groove-throated chameleon, and the montane side-striped chameleon, is a species of lizard in the family Chamaeleonidae. The species is indigenous to Africa.

Etymology: The specific name, ellioti, is in honor of British botanist George Francis Scott Elliot.

Geographic range: T. ellioti is found in Burundi, Democratic Republic of the Congo, Kenya, Rwanda, South Sudan, Tanzania, and Uganda.

Habitat: The preferred natural habitats of T. ellioti include forest, savanna, shrubland, and grassland, at altitudes of . It has also been found in disturbed areas such as plantations, gardens, and open fields.

Reproduction: The mode of reproduction of T. ellioti has been described as viviparous and as ovoviviparous.