Liolaemus constanzae, commonly known as Constanza´s tree iguana, is a species of lizard in the family Liolaemidae. The species is endemic to South America.

Etymology: The specific name, constanzae, is in honor of Constanza Donoso-Barros, eldest daughter of Roberto Donoso-Barros.

The synonym, Liolaemus donosoi, was named in honor of Roberto Donoso-Barros.

Geographic range: L. constanzae is found in Chile, possibly Argentina (no confirmed records seem to exist), and is expected to be present in Bolivia.

Habitat: The preferred natural habitats of L. constanzae are sandy and rocky areas in desert and shrubland, at altitudes of .

Diet: L. constanzae feeds on plants and seeds, and it preys upon small invertebrates.

Reproduction: L. constanzae is oviparous.