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 900 m (3,000 ft) above sea level. It is 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.