It comprises the eastern half of the island of Timor, the nearby islands of Atauro and Jaco, and Oecussi-Ambeno, an exclave on the northwestern side of the island, within Indonesian West Timor.
It includes the eastern half of Timor, the islands of Atauro and Jaco, and Oecussi-Ambeno, an area on the northwestern side of  Indonesian West Timor.