It is endemic to northern Papua New Guinea and is known the Adelbert Range westward, including the adjacent coastal areas, to the Schrader Range and further to Lumi in the West Sepik Province.

Black lumbar ocelli with white anterior edging are usually present.

[2] The male advertisement call is a series of 20–28 notes, with a dominant frequency of 2900–3200 Hz.

[2] Oreophryne hypsiops occurs in tropical rainforests at elevations up to about 975 m (3,199 ft) above sea level.

Calling males are perched in vegetation as high as five meters above the ground.