Liolaemus cyanogaster, commonly known as the cyan tree iguana, is a species of lizard in the family Liolaemidae. The species is endemic to Chile, being abundant between Concepción and Puerto Montt.

Habitat: The preferred natural habitats of L. cyanogaster are grassland, shrubland, and forest, at altitudes from sea level to .

Diet: L. cyanogaster preys upon insects.

Reproduction: L. cyanogaster is viviparous.