The Treasury Island tree frog (Litoria thesaurensis) is a species of frog in the Hylidae family. It is found in Indonesia, Papua New Guinea, and Solomon Islands. Its natural habitats are subtropical or tropical moist lowland forests, subtropical or tropical moist montane forests, swamps, freshwater marshes, intermittent freshwater marshes, rural gardens, heavily degraded former forests, and canals and ditches. It is threatened by habitat loss.