Presbytis thomasi is one of several langurs found in the Oriental islands. However, its geographic range is fairly limited. Its native home consists of North Sumatra of Indonesia—more specifically, north of Sungai Wampu and Sungai Simpang Kiri. (Colijn and Muchtar, 1996; Nowak, 1999)

 

Biogeographic Regions: Oriental; Oriental :: Native

Other Geographic Terms: Island endemic