Wild orangutans live only on the islands of Borneo and Sumatra. Their population on Sumatra is currently limited to the provinces of Aceh and North Sumatra. Most Sumatran orangutans (Pongo abelii) are found in Aceh. Bornean orangutans (Pongo pygmaeus - 3 subspecies) are found in scattered populations in Malaysian Borneo (Sarawak and Sabah) and Indonesian Borneo (Central, East and West Kalimantan).