Kampong Sinarubai is a village located in the Brunei-Muara District of Brunei. It is situated on the outskirts of the nation's capital, Bandar Seri Begawan, and falls within the administrative area of Mukim Kilanas.
The village carries the postcode BF2120 and had a recorded population of 2,319 in 2016. Administratively, Kampong Sinarubai is under the responsibility of the village head of Kampong Bengkurong.