West Pasaman Regency
West Pasaman Regency is a regency 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 and 431,672 at the 2020 Census; the official estimate as at mid 2023 was 450,050 - comprising 227,838 males and 222,232 females. The seat of the regency administration is the town of Simpang Ampek.
Administrative districts
West Pasaman Regency is divided into eleven districts, tabulated below with their areas and their populations at the 2010 Census and the 2020 Census, together with the official estimates as at mid 2023. The table also includes the location of the district administrative centres, the number of administrative villages in each district, and its post code.| Name of District | 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 | 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: includes 12 offshore islands.