Sai Mai district
Sai Mai 
    สายไหม  | |
|---|---|
Soi Phahon Yothin 54, Khlong Thanon, Sai Mai  | |
Khet location in Bangkok  | |
| Coordinates: 13°55′9″N 100°38′45″E / 13.91917°N 100.64583°E | |
| Country | Thailand | 
| Province | Bangkok | 
| Seat | O Ngoen | 
| Khwaeng | 3 | 
| District established | 21 November 1997 | 
| Area | |
 • Total  | 44.615 km2 (17.226 sq mi) | 
| Population  (2022)  | |
 • Total  | 208,928 | 
| • Density | 4,682.91/km2 (12,128.7/sq mi) | 
| Time zone | UTC+7 (ICT) | 
| Postal code | 10220  | 
| Geocode | 1042 | 
Sai Mai (Thai: สายไหม, pronounced [sǎːj mǎj]) is one of the 50 districts (khet) of Bangkok, Thailand. It is bounded by (from north clockwise): Lam Luk Ka district of Pathum Thani province; Khlong Sam Wa, Bang Khen and Don Mueang of Bangkok.