Uthai district
Uthai 
    อุทัย  | |
|---|---|
District location in Ayutthaya province  | |
| Coordinates: 14°21′43″N 100°40′13″E / 14.36194°N 100.67028°E | |
| Country | Thailand | 
| Province | Ayutthaya | 
| Seat | Uthai | 
| Muban | 107 | 
| Area | |
 • Total  | 186.8 km2 (72.1 sq mi) | 
| Population  (2000)  | |
 • Total  | 39,943 | 
| • Density | 213.8/km2 (554/sq mi) | 
| Time zone | UTC+7 (ICT) | 
| Postal code | 13210 | 
| Geocode | 1414 | 
Uthai (Thai: อุทัย, pronounced [ʔùʔ.tʰāj]) is a district (amphoe) in the eastern part of Ayutthaya province, in Thailand.