Brunei is divided into four districts:

Brunei-Muara district: is located in the north-east, bordering the South China Sea and Labuan (Malaysia) to the north. The district area is 571 km2

Tutong District: The district borders the South China Sea to the north, the Bruneian district of Brunei and Muara and the Malaysian state of Sarawak to the east and the Bruneian district of Belait to the west.  It covers 1166 km2

Belait District: is the largest as well as the western-most. The district covers 2,724 km2

 

Temburong District: is the easternmost district in Brunei. It is an exclave, as it is separated from the rest of Brunei by Malaysia and Brunei Bay. It covers 1,304 km2