Lao River, Thailand

Lao River (น้ำแม่ลาว)
River
The Lao River at Ban Tha Sai, Chiang Rai Province
Country	Thailand
State	Chiang Rai Province
Districts	Wiang Pa Pao, Mae Suai, Mae Lao, Mueang Chiang Rai
Tributaries
- left	Suai River
City	Chiang Rai city
Source
- location	Phi Pan Nam Range, Chiang Rai Province, Thailand
Mouth	Kok River
- location	Sum Pratu, Chiang Rai Province
- elevation	386 m (1,266 ft)
- coordinates	19°55′35″N 99°53′57″E / 19.92639°N 99.89917°E / 19.92639; 99.89917Coordinates: 19°55′35″N 99°53′57″E / 19.92639°N 99.89917°E / 19.92639; 99.89917
Length	206 km (128 mi)
Basin	3,224 km2 (1,245 sq mi)
Discharge	for Mae Lao District
- average	28 m3/s (989 cu ft/s)
- max	451 m3/s (15,927 cu ft/s)
- min	0.3 m3/s (11 cu ft/s)
Map of the Thai highlands

The Lao River or Mae Lao River (Thai: น้ำแม่ลาว, RTGS: Nam Mae Lao, pronounced [náːm mɛ̂ː lāːw]) is a river in Chiang Rai Province, Northern Thailand. It is a tributary of the Kok River, with its mouth near Sum Pratu in Mueang Chiang Rai District. This river gives its name to the Mae Lao District.

The Lao River originates in the Phi Pan Nam Range and flows initially northwards across Wiang Pa Pao District and then northeastwards through the districts of Mae Suai, Mae Lao and Mueang Chiang Rai passing just south of Chiang Rai city.

The Suai River, which gives its name to the Mae Suai District, is one of the main tributaries of the Lao River.