Dok Khamtai district
Dok Khamtai 
    ดอกคำใต้  | |
|---|---|
District location in Phayao province  | |
| Coordinates: 19°9′45″N 99°59′36″E / 19.16250°N 99.99333°E | |
| Country | Thailand | 
| Province | Phayao | 
| Seat | Don Si Chum | 
| Area | |
 • Total  | 823.3 km2 (317.9 sq mi) | 
| Population  (2005)  | |
 • Total  | 73,205 | 
| • Density | 88.9/km2 (230/sq mi) | 
| Time zone | UTC+7 (ICT) | 
| Postal code | 56120 | 
| Geocode | 5605 | 
Dok Khamtai (Thai: ดอกคำใต้, pronounced [dɔ̀ːk kʰām.tâːj]; Northern Thai: ดอกคำใต้, pronounced [dɔ̀ːk kʰām.ta᷇ːj]) is a district (amphoe) of Phayao province in northern Thailand.