Kuala Belait
Rasau is located in the Belait district on the west bank of the Belait River south of Kampong Sungai Teraban, close to the district capital of Kuala Belait. It is one of the villages in Mukim Kuala Belait. It is located at 114°11′E longitude and 4°34′N latitude. To the north lies Kampong Sungai Teraban. The Malaysian state of Sarawak lies to the west and south with the Asam Paya oil field to the southwest. Across the Belait River to the east lies the southern portion of Kuala Belait and Kampong Sungai Duhon.