Indonesia–Malaysia border Indonesia–Malaysia border The border between the Southeast Asian countries of Indonesia and Malaysia consist of both a land border separating the two countries' territories on the island of Borneo as well as maritime boundaries along the length of the Straits of Malacca, in the South China Sea and in the Celebes Sea. The land boundary has a length of 2,019.5 km and stretches from Tanjung Datu at the northwestern corner of Borneo, through the highlands of the Borneo hinterland, to the Gulf of Sebatik and the Celebes Sea in the eastern side of the island. The boundary separates the Indonesian
Brunei coastline next to the South China Sea, and it shares a border with Malaysia. It has of territorial waters, and a exclusive economic zone. About 97% of the population lives in the larger western part (Belait, Tutong, and Brunei-Muara), while only about 10,000 people live in the mountainous eastern part (Temburong District). The total population of Brunei is approximately 408,000 , of which around 150,000 live in the capital Bandar Seri Begawan. Other major towns are the port town of Muara, the oil-producing town of Seria and its neighbouring town, Kuala Belait. In Belait District, the Panaga area is home