Southern Kalimantan, Indonesia, between the Kahayan and Kapuas rivers and formerly possibly farther west to Pontianak (in which case it takes the name Pongo pygmaeus borneo). Resembles Pongo pygmaeus borneo in palate size but rest of skull much larger.
Sumber: The type specimens and type localities of the orangutans, genus Pongo Lacépède, 1799 (Primates: Hominidae)
