Huai So
Huai So is a tambon of Chiang [Khong District], in Chiang [Rai Province], Thailand. The main settlement of the subdistrict is also named Huai So.
Administration
The area of the subdistrict forms a Subdistrict Municipality as its local government. In 1995 it was established as a tambon [administrative organization] and upgraded to a municipality in 2007.The subdistrict is divided into 23 administrative villages.