Borneo (Malay: Borneo, Indonesian: Kalimantan) is the third largest island in the world and is located north of Australia, at the geographic centre of Maritime Southeast Asia.

The island is divided among three countries: Brunei, Indonesia and Malaysia. Approximately 73% of the island is Indonesian territory (Kalimantan). The Malaysian states of Sarawak and Sabah (East Malaysia), in the north, occupy about 26% of the island. The sovereign state of Brunei, located on the north coast, comprises about 1% of Borneo’s land area.