The Limbang District is one of the two districts of Limbang Division, Malaysia. It has a total area of 3,978.10 square kilometres. The major town is Limbang. It has one sub-district, which is Nanga Medamit Sub-District. It bisects the sovereign state of Brunei Darussalam to the west and east, and borders the Malaysia Lawas District to the southeast and Miri District to the south and southwest. Due to being squeezed in between Brunei at its north and coastal areas, Limbang is accessible by road only through cross-border immigration posts.

The area was annexed from Brunei in 1890 by Charles Anthoni Johnson Brooke, the second White Rajah of Sarawak, to become his realm’s fifth division. The annexation was strongly disputed by Brunei.

The de facto boundary ran along the watershed between the Brunei River and Limbang River basins on the western side of the district, and along the length of the Pandaruan River on the eastern side. Boundary agreements have delineated a stretch of the western border and the Pandaruan River while the other stretches have yet to be delineated.

Despite its annexation to Sarawak, Limbang has been officially claimed since 1967 by Brunei as part of its integral territory. It is the main issue of the Brunei–Malaysia border disputes since Limbang separates Brunei territorially into two parts.

The population of Limbang district (year 2024) was 69,990.

Limbang is traditionally a home to Bruneian Malay, Kedayan, Chinese, Iban, Lun Bawang and Orang Ulu people.

Limbang is the most culturally diverse and distinct part of Sarawak. It is a melting pot of many cultures, including Malay, Kedayan, Chinese, Iban and various Orang Ulu ethnic groups such as Lun Bawang, Bisaya, Murut, Kelabit and Penan. It has one of the highest concentration of Orang Ulu people in Sarawak.

Note:
¹ Excluding Kedayan.
² Including Kedayan and other Orang Ulu such as Lun Bawang, Kelabit, Penan, Murut etc.