Kuala Belait is a mukim of Brunei and is also the westernmost mukim in the Belait District and in Brunei. It is bounded by the South China Sea to the north, Mukim Seria to the east, Kuala Balai to the south-east and Sarawak (Malaysia) to the south and west.
Mukim Kuala Belait includes these following areas:
Other locations within the mukim include:
Coordinates: 4°35′N 114°11′E / 4.583°N 114.183°E