| Mai Sơn District | |
| Settlement Type: | District |
| Native Name: | Huyện Mai Sơn |
| Coordinates: | 21.1989°N 104.1°W |
| Subdivision Type: | Country |
| Subdivision Type1: | Region |
| Subdivision Name1: | Northwest |
| Subdivision Type2: | Province |
| Subdivision Name2: | Sơn La |
| Seat Type: | Capital |
| Seat: | Hát Lót |
| Government Type: | District |
| Parts Type: | Subdivision |
| Parts: | one township and 21 rural communes |
| Area Total Km2: | 1,410 |
| Population As Of: | 2019 |
| Population Footnotes: | [1] |
| Population Total: | 163,881 |
| Population Density Km2: | auto |
| Timezone: | UTC + 7 |
| Utc Offset: | +7 |
Mai Sơn is a rural district of Sơn La province in the Northwest region of Vietnam. As of 2019, the district had a population of 163,881.[1] The district covers an area of 1,410 km². The district capital lies at Hát Lót.[2]
Mai Sơn is divided into 22 commune-level sub-divisions, including the township of Hát Lót and 21 rural communes (Chiềng Ban, Chiềng Chăn, Chiềng Chung, Chiềng Dong, Chiềng Kheo, Chiềng Lương, Chiềng Mai, Chiềng Mung, Chiềng Nơi, Chiềng Sung, Chiềng Ve, Cò Nòi, Hát Lót, Mường Bằng, Mường Bon, Mường Chanh, Nà Bó, Nà Ớt, Phiêng Cằm, Phiêng Pằn, Tà Hộc).