Administration
The district is subdivided into 8 subdistricts (tambon), which in turn are further subdivided into 92 villages (muban). There are two subdistrict municipalities (thesaban tambon) within the district - Mai Sai itself covering parts of the tambon Mae Sai and Wiang Phang Kham, and Huai Khrai covering parts of the tambon Huai Khrai. There are further 8 Tambon administrative organizations (TAO).
| No. | Name | Thai name | Villages | Inh. | |
|---|---|---|---|---|---|
| 1. | Mae Sai | แม่สาย | 14 | 21,697 | |
| 2. | Huai Khrai | ห้วยไคร้ | 11 | 7,609 | |
| 3. | Ko Chang | เกาะช้าง | 13 | 9,964 | |
| 4. | Pong Pha | โป่งผา | 12 | 8,348 | |
| 5. | Si Mueang Chum | ศรีเมืองชุม | 9 | 5,090 | |
| 6. | Wiang Phang Kham | เวียงพางคำ | 13 | 19,945 | |
| 8. | Ban Dai | บ้านด้าย | 8 | 4,117 | |
| 9. | Pong Ngam | โป่งงาม | 12 | 9,528 |
Read more about this topic: Mae Sai District