Sai Noi district
Sai Noi 
    ไทรน้อย  | |
|---|---|
Rice field, Sai Noi District  | |
District location in Nonthaburi province  | |
| Coordinates: 13°58′44″N 100°18′49″E / 13.97889°N 100.31361°E | |
| Country | Thailand | 
| Province | Nonthaburi | 
| Seat | Khlong Khwang | 
| Subdistricts | 7 | 
| Mubans | 68 | 
| District established | 1 January 1948 | 
| Area | |
 • Total  | 186.017 km2 (71.822 sq mi) | 
| Population  (2017)  | |
 • Total  | 65,516 | 
| • Density | 352.20/km2 (912.2/sq mi) | 
| Time zone | UTC+7 (ICT) | 
| Postal code | 11150 | 
| Geocode | 1205 | 
Sai Noi (Thai: ไทรน้อย, pronounced [sāj nɔ́ːj]) is the northwesternmost district (amphoe) of Nonthaburi province, central Thailand.