| West Kutai Regency | |
| Native Name: | Kabupaten Kutai Barat |
| Native Name Lang: | id |
| Settlement Type: | Regency |
| Pushpin Map: | Indonesia_Kalimantan#Indonesia |
| Pushpin Label Position: | right |
| Pushpin Map Caption: | Location in Kalimantan and Indonesia |
| Coordinates: | -0.5942°N 115.5157°W |
| Subdivision Type: | Country |
| Subdivision Name: | Indonesia |
| Subdivision Type1: | Region |
| Subdivision Name1: | Kalimantan |
| Subdivision Type2: | Province |
| Subdivision Name2: | East Kalimantan |
| Seat Type: | Capital |
| Seat: | Sendawar |
| Leader Title: | Regent |
| Leader Name: | FX. Yapan |
| Leader Title1: | Vice Regent |
| Leader Name1: | Edyanto Arkan |
| Unit Pref: | Metric |
| Area Total Km2: | 20384.60 |
| Population As Of: | mid 2023 estimate |
| Population Footnotes: | [1] |
| Population Total: | 177007 |
| Population Density Km2: | auto |
| Timezone1: | ICST |
| Utc Offset1: | +8 |
| Area Code Type: | Area code |
| Area Code: | (+62) 545 |
West Kutai Regency (Indonesian: Kabupaten Kutai Barat) is a regency (kabupaten) in the Indonesian province of East Kalimantan. It previously covered a much greater area, with a population of 165,091 at the 2010 Census, but on 11 January 2013 the five northernmost districts were split off to form a new Mahakam Ulu Regency; the residual area of West Kutai Regency is 20,384.6 km2, and it had a population of 140,097 at the 2010 Census,[2] and 165,938 at the 2020 Census;[3] the official estimate as at mid 2023 was 177,007.[4] The town of Sendawar is the administrative capital.
Following the removal of the northern five districts in December 2012 to form the new Mahakam Ulu Regency, the residual West Kutai Regency is divided into sixteen districts (kecamatan), tabulated below with their areas and their 2010[5] and 2020[6] Census populations, together with the official estimates as at mid 2023[7] The table also includes the locations of the district administrative centres, the number of administrative villages (totaling 190 rural kamponmg or desa, and 4 urban kelurahan) in each district, and its postal codes.
| Kode Wilayah | Name of District (kecamatan) | Area in km2 | Pop'n Census 2010 | Pop'n Census 2020 | Pop'n Estimate mid 2023 | Admin centre | No. of villages | Post codes | |
|---|---|---|---|---|---|---|---|---|---|
| 64.07.12 | Bongan | 2,305.3 | 8,997 | 10,499 | 11,614 | Muara Kendang | 16 | 75772 | |
| 64.07.11 | Jempang | 744.5 | 11,279 | 11,211 | 11,932 | Tanjung Isuy | 12 | 75773 | |
| 64.07.13 | Penyinggahan | 192.1 | 3,904 | 3,815 | 4,042 | Penyinggahan Ilir | 6 | 75763 | |
| 64.07.10 | Muara Pahu | 1,110.6 | 8,272 | 8,344 | 8,811 | Tanjung Laor | 12 | 75774 | |
| 64.07.17 | Siluq Ngurai | 1,629.1 | 4,292 | 5,880 | 6,455 | Muhur | 16 | 75771 | |
| 64.07.09 | Muara Lawa | 436.7 | 6,483 | 7,033 | 7,708 | Muara Lawa | 8 | 75775 | |
| 64.07.14 | Bentian Besar | 1,856.1 | 3,093 | 3,213 | 3,437 | Dilang Puti | 9 | 75778 | |
| 64.07.08 | Damai | 2,027.5 | 8,476 | 10,549 | 11,198 | Damai Kota | 17 | 75777 | |
| 64.07.16 | Nyuatan | 1,343.3 | 5,348 | 6,357 | 6,734 | Dempar | 10 | 75776 & 75777 | |
| 64.07.07 | Barong Tongkok | 405.9 | 23,935 | 31,746 | 34,647 | Barong Tongkok | 21 (a) | 75776 | |
| 64.07.15 | Linggang Bigung | 2,299.1 | 13,712 | 15,843 | 16,395 | Linggang Bigung | 11 | 75576 | |
| 64.07.06 | Melak | 179.2 | 10,596 | 15,041 | 15,840 | Melak Ilir | 6 (b) | 75765 | |
| 64.07.20 | Sekolaq Darat | 49.3 | 8,394 | 10,301 | 10,903 | Sekolaq Darat | 8 | 75764 | |
| 64.07.18 | Mook Manaar Bulatn | 2,964.6 | 7,478 | 8,409 | 8,796 | Gunung Rampah | 16 | 75765 (c) | |
| 64.07.05 | Long Iram (d) | 2,499.5 | 6,407 | 7,184 | 7,472 | Long Iram Kota | 11 | 75766 | |
| 64.07.19 | Tering | 341.8 | 9,431 | 10,513 | 11,023 | Tering Lama | 15 | 75760 | |
| Totals | 20,384.6 | 140,097 | 165,918 | 177,007 | Sendawar | 194 |
Notes: (a) includes 2 kelurahan - Barong Tongkok and Simpang Raya. (b) includes 2 kelurahan - Melak Ilir and Melak Ulu.
(c) except the four villages of Abit, Muara Jawaq, Rembayan and Tondah (which share a postcode of 75774). (d) includes the riverine island of Pulau Kualan.