Liolaemus magellanicus, also known commonly as Magellan´s tree iguana, is a species of lizard in the family Liolaemidae. The species is native to southern South America. It is notable for being the southernmost lizard species in the world.

Etymology: The specific name, magellanicus, refers to the Straits of Magellan.

Geographic range: Liolaemus magellanicus is found in Patagonia and Isla Grande de Tierra del Fuego in Chile and Argentina.

Habitat: The preferred natural habitat of Liolaemus magellanicus is areas of low vegetation such as grassland and shrubland, at elevations from sea level to .

 Liolaemus magellanicus may attain a snout-to-vent length (SVL) of , with a tail length about equal to the SVL.