Many of these plants grow along the tributary (Mumong River), which in the past, was often used as a base to place boats for the purpose of going upstream or downstream to the sea.

It is surrounded by the suburb of Pandan to the north and north-west, the settlement of Panaga to east, and Belait River to the south.

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.

As of 2018[update], the village has a population of approximately 9,637 people, namely 5,289 males and 4,378 females, consisting of multiple races, tribes and religions.

[3] Like other villages in the country, the Members of the Majlis Perundingan Kampung (MPK) Mumong 'A' and Mumong 'B' joined hands to implement several projects under the One Village One Product Programme (1K1P) such as producing chili sauce, jam, baulu, cordel drink, marble cake, and other sweets.

In this implementation, the MPK Mumong Women's Bureau is responsible for promoting the product to the public.

In order to obtain a continuous supply of Rosella fruit (Hibiscus sabdariffa), MPK Mumong has already planted Rosella fruit trees in groups in the yard of the project members, in the MPK activity centre and in the yard of the villagers.

The Seria Bypass and Jalan Singa Menteri links Mumong west to Kuala Belait, and onwards to Miri in Malaysia; and east to Seria, onwards to Tutong and Bandar Seri Begawan.