West Kotawaringin Regency () is one of the thirteen regencies which comprise the Central Kalimantan Province on the island of Kalimantan (Borneo), Indonesia. It originally comprised the whole western part of the province, having been split from a single Kotawaringin Regency on 26 June 1959 into separate regencies for West and East Kotawaringin, but on 10 April 2002 the most westerly districts of West Kotawaringin were split off to form the new Lamandau Regency and Sukamara Regency. The residual West Kotawaringin Regency has a land area of about 10,759 km2, and its population was 235,803 at the 2010 CensusBiro Pusat Statistik, Jakarta, 2011. and 270,388 at the 2020 Census;Badan Pusat Statistik, Jakarta, 2021. the official estimate as at mid 2025 was 285,737 (comprising 147,130 males and 138,310 females).Badan Pusat Statistik, Jakarta, 27 February 2026, Kabupaten Kotawaringin Barat Dalam Angka 2026 (Katalog-BPS 1102001.6201) The large town of Pangkalan Bun in Arut Selatan District is the capital of West Kotawaringin Regency.
Administrative districts West Kotawaringin Regency now consists of six administrative districts (kecamatan), tabulated below with their areasBadan Pusat Statistik, Jakarta, 28 February 2025, Kabupaten Kotawaringin Barat Dalam Angka 2025 (Katalog-BPS 1102001.6201) and population totals from the 2010 Census and the 2020 Census, together with the official estimates as at mid 2025.Badan Pusat Statistik, Jakarta, 27 February 2026, Kabupaten Kotawaringin Barat Dalam Angka 2026 (Katalog-BPS 1102001.6201) Pangkalan Banteng and Pangkalan Lada Districts were previously the northern part of Kumai District. The table also includes the locations of the district administrative centres, the number of administrative villages in each district (a total of 81 rural desa and 13 urban kelurahan), and its post codes. Kode Wilayah Name ofDistrict(kecamatan) Area in km2 Pop'nCensus2010 Pop'nCensus2020 Pop'nEstimatemid 2025AdmincentreNo. ofvillagesPostcodes 62.01.03 Kotawaringin Lama Badan Pusat Statistik, Jakarta, 26 September 2024, Kecamatan Kotawaringin Lama Dalam Angka 2024 (Katalog-BPS 1102001.6201040) 1,218.0 16,796 19,138 20,081Kotawaringin Hilir 17 (a) 74161 62.01.02 Arut Selatan Badan Pusat Statistik, Jakarta, 26 September 2024, Kecamatan Arut Selatan Dalam Angka 2024 (Katalog-BPS 1102001.6201050) (South Arut) 2,400.0 98,406 117,742 126,499Madurejo (in Pangkalan Bun) 20 (b) 74111- 74117 62.01.01 KumaiBadan Pusat Statistik, Jakarta, 26 September 2024, Kecamatan Kumai Dalam Angka 2024 (Katalog-BPS 1102001.6201060) 2,921.0 46,544 52,633 55,024Candi 18 (c) 74181 62.01.06 Pangkalan Banteng Badan Pusat Statistik, Jakarta, 26 September 2024, Kecamatan Pangkalan Banteng Dalam Angka 2024 (Katalog-BPS 1102001.6201061) 1,306.0 30,597 37,370 37,835Karang Mulya 1774183 62.01.05 Pangkalan Lada Badan Pusat Statistik, Jakarta, 26 September 2024, Kecamatan Pangkalan Lada Dalam Angka 2024 (Katalog-BPS 1102001.6201062) 229.03 27,934 34,164 37,097Pandu Sanjaya 1174184 62.01.04 Arut Utara Badan Pusat Statistik, Jakarta, 26 September 2024, Kecamatan Arut Utara Dalam Angka 2024 (Katalog-BPS 1102001.6201070)(North Arut) 2,685.0 15,526 9,341 9,201Pangkut 11 (d) 74152 Totals 10,759.0 235,803 270,388 285,737Pangkalan Bun 94
Notes: (a) including 2 kelurahan (Kotawaringin Hilir and Kotawaringin Hulu). (b) comprising 7 kelurahan - Mendawai Seberang (with 2,337 inhabitants in mid 2024), Mendawai (12,853), Madurejo (24,681), Sidorejo (19,086), Raja (6,727), Raja Seberang (2,602) and Baru (25,828), together with 13 desa. (c) including 3 kelurahan (Candi, Kumai Hilir and Kumai Hulu). (d) including 1 kelurahan (Pangkut).
References