| Official Name: | West Pasaman Regency |
| Native Name: | Kabupaten Pasaman Barat |
| Native Name Lang: | id |
| Type: | Regency |
| Motto: | Tuah Basamo |
| Coordinates: | 0.2815°N 99.5197°W |
| Subdivision Type: | Country |
| Subdivision Name: | Indonesia |
| Subdivision Type1: | Province |
| Subdivision Name1: | West Sumatra |
| Seat Type: | Regency seat |
| Seat: | Simpang Ampek |
| Leader Title: | Regent |
| Leader Name: | Hamsuartod |
| Area Total Km2: | 3887.77 |
| Population As Of: | mid 2023 estimate |
| Population Total: | 450050 |
| Population Density Km2: | auto |
| Population Footnotes: | [1] |
| Timezone1: | IWST |
| Utc Offset1: | +7 |
| Area Code: | (+62) 753 |
| Pushpin Map: | Indonesia_Sumatra#Indonesia |
| Pushpin Map Caption: | Location in Sumatra and Indonesia |
| Leader Title1: | Vice Regent |
| Leader Name1: | Risnawantod |
| Area Code Type: | Area code |
West Pasaman Regency (Indonesian: Kabupaten Pasaman Barat) is a regency (kabupaten) of West Sumatra, Indonesia. It has an area of 3,887.77 km2, and it had a population of 365,129 at the 2010 Census[2] and 431,672 at the 2020 Census;[3] the official estimate as at mid 2023 was 450,050 - comprising 227,838 males and 222,232 females.[4] The seat of the regency administration is the town of Simpang Ampek.
West Pasaman Regency is divided into eleven districts (kecamatan), tabulated below with their areas and their populations at the 2010 Census [5] and the 2020 Census,[6] together with the official estimates as at mid 2023.[7] The table also includes the location of the district administrative centres, the number of administrative villages (nagari) in each district, and its post code.
| Name of District (kecamatan) | Area in km2 | Pop'n Census 2010 | Pop'n Census 2020 | Pop'n Estimate mid 2023 | Admin centre | No. of vill. | Post code | |
|---|---|---|---|---|---|---|---|---|
| Sungai Beremas (a) | 440.48 | 22,345 | 27,556 | 29,080 | Air Bangih | 1 | 26573 | |
| Ranah Batahan | 354.88 | 23,483 | 27,481 | 28,563 | Silaping | 2 | 26366 | |
| Koto Balingka | 340.78 | 26,048 | 30,550 | 31,774 | Parit | 1 | 26572 | |
| Sungai Aur | 420.16 | 30,846 | 36,031 | 37,430 | Koto Dalam | 1 | 26574 | |
| Lembah Melintang | 263.77 | 41,924 | 49,289 | 51,299 | Ujung Gading | 1 | 26570 | |
| Gunung Tuleh | 453.97 | 20,315 | 24,166 | 25,237 | Simpang Tigo Alin | 2 | 26571 | |
| Talamau | 324.24 | 25,871 | 29,805 | 30,838 | Talu | 3 | 26561 | |
| Pasaman | 508.93 | 62,864 | 77,102 | 81,240 | Simpang Ampek | 3 | 26566 | |
| Luhak Nan Duo | 174.21 | 37,409 | 44,084 | 45,913 | Sungai Talang | 2 | 26568 | |
| Sasak Ranah Pasisie | 123.71 | 13,233 | 14,946 | 15,375 | Sasak | 1 | 26367 | |
| Kinali | 482.64 | 60,791 | 70,662 | 73,301 | Kinali | 2 | 26567 | |
| Totals | 3,887.77 | 365,129 | 431,672 | 450,050 | Simpang Ampek | 19 |
Note: (a) includes 12 offshore islands.
Pusako Anak Nagari Airport is an airport that located in Luhak Nan Duo district, West Pasaman Regency
Talamau Peak (2,900 masl) can be accessed from Bundaran Simpang Ampek Pasaman vice versa in two or three days trip and located at Jorong Pinagar Nagari Aur Kuning, Pasaman District, West Pasaman Regency. Mount Talamau has more than 10 waterfalls and at around the peak there are also more than 10 lakes surrounding by many kinds of colourful flowers.[8]