The town is in the Mukim Bangar (sub-district) of Temburong District. The population is 3,970 inhabitants.
One main road runs through the town, roughly east-west. Headed east of Bangar is Lawas, Sarawak (Malaysia) and to the west is the river crossing to Limbang, Sarawak (Malaysia). The road is the major route to the local quarry where boulders are collected, processed and shipped to stockyards in the capital, Bandar Seri Begawan, for construction companies.