|Native name||แม่น้ำวัง (Thai)|
|State||Chiang Rai Province, Lampang Province|
|• location||Phi Pan Nam Range, Phan District, Chiang Rai Province|
|West of Mae Salit, Ban Tak District, Tak Province|
|128 m (420 ft)|
|Length||392 km (244 mi)|
|Basin size||10,794 km2 (4,168 sq mi)|
|• location||Sam Ngao District|
|• average||52 m3/s (1,800 cu ft/s)|
|• minimum||0 m3/s (0 cu ft/s)|
|• maximum||1,100 m3/s (39,000 cu ft/s)|
The Wang River is 335 kilometres (208 mi) long. Its waters flow from north to south. The Wang River has its source in the Phi Pan Nam Range in Wiang Pa Pao District, Chiang Rai Province. One of the principal settlements along the river is Lampang, which is on the north bank of a curve in the river. From Lampang, the river flows southwards passing by Thoen into Tak Province. It joins the Ping River near Mae Salit, Ban Tak District, north of the town of Tak. The Ping River is a tributary of the Chao Phraya River.
Kiu Lom Dam (เขื่อนกิ่วลม) is on the Wang River about 38 kilometres (24 mi) from Lampang town.