Litoria spartacus is a species of frog in the subfamily Pelodryadinae of the family Hylidae.

[3] It is endemic to Papua New Guinea and is only known from two localities within the Kikori Integrate Conservation and Development Project Area in the Southern Highlands Province.

The dorsum has yellowish green background color, and is overlaid by extensive light to dark brown blotching.

The ventral surfaces are dirty off-white, mixed with very light grey patches, and sometimes with brown speckling concentrated laterally.

[2] Litoria spartacus is known from riparian rainforest at elevations of 800–1,345 m (2,625–4,413 ft) above sea level.