Ngao River

Ngao River
Ngao River in Ngao town
Native nameแม่น้ำงาว (Thai)
Location
CountryThailand
StatePhayao Province, Lampang Province, Phrae Province
CityNgao town
Physical characteristics
Source 
  locationPhi Pan Nam Range, Phayao Province
  elevation1,267 m (4,157 ft)
MouthYom River
  location
Kaeng Suea Ten area, Song District, Phrae Province
  coordinates
18°35′54″N 100°8′53″E / 18.59833°N 100.14806°E / 18.59833; 100.14806
  elevation
195 m (640 ft)
Length98 km (61 mi)
Basin size1,800 km2 (690 sq mi)

The Ngao River (Thai: แม่น้ำงาว, RTGS: Maenam Ngao, pronounced [mɛ̂ː.náːm ŋāːw]; Northern Thai: น้ำแม่งาว, pronounced [náːm mɛ̂ː.ŋāːw]) is a river of Thailand with its source in the Phi Pan Nam Range. It is a tributary of the Yom River, part of the Chao Phraya River basin.

The Ngao in this basin should not be confused with the Ngao River that is a tributary of the Yuam River (แม่น้ำยวม), part of the Salween basin, located to the west.