Mumong, or Kampong Mumong in Malay is a village located in the Belait district of Brunei Darussalam between the towns of Kuala Belait and Seria. It serves as a suburb for both of these towns. Technically it is two villages - Kampong Mumong (Mumong Utara) north of the Seria Bypass, and Kampong Mumong Selatan, south of the Seria Bypass.
Mumong is located in Mukim Kuala Belait of the Belait district between the towns of Kuala Belait and Seria. It is bounded by Sungai Belait to the south, Panaga in Seria to the east and Kampong Sungai Pandan to the north and west.
For the purpose of this article, Mumong is referred to the area south of Jalan Singa Menteri and east of the extension of Jalan Pandan Lima to the Seria Bypass. It includes the following kampongs:
Mumong was a small Malay village on the banks of the Belait River further upstream from Kuala Belait on the way to Kuala Balai. The development of Kuala Belait at the turn of the century as the district capital and the construction of Jalan Singa Menteri and Jalan Tengah to like Kuala Belait to Seria saw the village grow south of Jalan Singa Menteri to become mainly a commuter community serving Kuala Belait and Seria towns. The construction of the Seria Bypass in the 1980s further encouraged more settlement of the area as it provided a second link from the village to Kuala Belait and Seria.
The government of Brunei has also continued to improve the area with the construction of the Mumong Resettlement Area, a Landless Housing Scheme area located to the west of the kampong. Other infrastructure constructed in the kampong includes the Mumong Youth Centre and Sports Complex in the 1990s which also serves the communities in the vicinity of Kuala Belait and Panaga, and the Kuala Belait Sewerage Treatment plant.
Mumong also lends its name to the Mumong Telephone exchange area, although the physical location of the exchange is in Kampong Sungai Pandan.