Mukim Liang is a mukim in Belait District, Brunei.^[3] The population was 14,301 in 2016.^[2]

The mukim is located in the north of the district, bordering the South China Sea to the north, Mukim Telisai in Tutong District to the north-east, Mukim Bukit Sawat to the south-east, Mukim Labi to the south and Mukim Seria to the west.^[4]

As of 2016 census,^[2] the population was 14,301 with 51.4% males and 48.6% females. The mukim had 2,607 households occupying 2,602 dwellings. Among the population, 32.3% lived in urban areas, while the remainder of 67.7% lived in rural areas.

As of 2016, the mukim comprised the following census villages:^[2]

The villages above are currently grouped into three areas and each is overseen by a village head (ketua kampung). The areas include:^{[citation needed]}

• Kampong Lumut I
• Kampong Lumut II
• Kampong Sungai Liang