This species is endemic to Sumatra (Indonesia), where it is found south of the Wampu and Simpang Kiri Rivers (except for the eastern coastal forests), and on Pulau Pini in the Batu Archipelago (Groves 2001).

Presbytis melalophos melalophos
Found in southwestern Sumatra, from the upper Sungai Rokan south to the upper Sungai Hari and beyond along the Barisan Range into Lampung (Groves 2001).

Presbytis melalophos mitrata
Found in southeastern Sumatra, from Lampung north to the upper Musi River drainage, west of Palembang, and north to the Batang Hari River (Groves 2001).

Presbytis melalophos bicolor
Found in west-central Sumatra, in the highlands from the middle and lower Sungai Hari to the middle Sungai Inderagiri (Groves 2001).

Presbytis melalophos sumatrana
Found in western Sumatra and Pulau Pini in the Batu Archipelago. On the Sumatran mainland found in the northern highlands and west coast south of the Sungai Simpang Kiri north of Gunung Talamau, southeast to the Rokan River, and on the east coast from Sungai Wampu to the Sungai Barumun.