Nong Muang Khai district
Nong Muang Khai 
    หนองม่วงไข่  | |
|---|---|
District location in Phrae province  | |
| Coordinates: 18°15′53″N 100°11′24″E / 18.26472°N 100.19000°E | |
| Country | Thailand | 
| Province | Phrae | 
| Seat | Nong Muang Khai | 
| Area | |
 • Total  | 221.65 km2 (85.58 sq mi) | 
| Population  (2005)  | |
 • Total  | 19,302 | 
| Time zone | UTC+7 (ICT) | 
| Postal code | 54170 | 
| Geocode | 5408 | 
Nong Muang Khai (Thai: หนองม่วงไข่, pronounced [nɔ̌ːŋ mûa̯ŋ kʰàj]) is a district (amphoe) in the central part of Phrae province, northern Thailand.