Gephyromantis leucocephalus is a species of frog in the family Mantellidae. It is endemic to southeastern Madagascar and found from Midongy-du-Sud south to Tôlanaro. It lives in a range of habitats with some tree cover, including rainforest, degraded habitats, and eucalyptus plantations, at elevations between 0 and 900m (3,000feet) above sea level. It is a very abundant species, but it is threatened by the loss and degradation of its forest habitat. It is found in the Andohahela and Midongy du sud National Parks.