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.

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.

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.