Temburong is the eastern-most district (daerah) in Brunei. It is an exclave, as it is separated from the rest of Brunei by Malaysia and the Brunei Bay . Its capital is Bangar . Other major towns and cities include Labu .

The district borders Brunei Bay to the north and Malaysia to the east, south and west.

The Sungai Temburong river flows through the district, and the Sungai Pandaruan river forms the eastern section of the border with Malaysia.