Tropidurus etheridgei, also known commonly as Etheridge´s lava lizard, is a species of lizard of the family Tropiduridae. The species is endemic to South America.

Etymology: The specific name, etheridgei, is in honor of American herpetologist Richard Emmett Etheridge.

Geographic range: T. etheridgei is found in Argentina, Bolivia, Brazil, and Paraguay.

Habitat: The preferred natural habitats of T. etheridgei are forest and savanna.

Reproduction: T. etheridgei is oviparous.