West Tanjung Jabung Regency (Kabupaten Tanjung Jabung Barat) is a regency of Jambi Province, Indonesia. It is located on the island of Sumatra. The regency was created on 4 October 1999 by the division of the then Tanjung Jabung Regency into eastern and western halves. The western regency now has an area of 5,009.82 km<sup>2</sup> and had a population of 278,741 as at the 2010 census and 317,498 at the 2020 census; the official estimate as at mid 2024 was 336,978 (comprising 173,688 males and 163,290 females). The regency seat is the town of Kuala Tungkal, a port at the mouth of the Tungkal River.
The regency is divided into thirteen districts (kecamatan), tabulated below with their areas and their populations at the 2010 census and the 2020 census, together with the official estimates as at mid 2024. The table also includes the locations of the district administrative centres, and the number of villages in each district (totaling 114 rural desa and 20 urban kelurahan - the latter comprising 8 in Tungkal Ilir District, and one in each of the other 12 districts), and its post code.
Note: (a) comprises 8 kelurahan (Kampung Nelayan, Patunas, Sriwijaya, Sungai Nibung, Tungkal II, Tungkal III, Tungkal IV Kota and Tungkal Harapan) and 2 desa.