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 makes up the eastern half of the island of Timor, and the nearby islands of Atauro and Jaco. It also makes up Oecussi-Ambeno, an exclave on the northwestern side of the island, in Indonesian West Timor.