Thung Chang District

Thung Chang (, ) is a district ("amphoe") in the northern part of Nan Province, northern Thailand.
History.
Thung Chang District dates back to the "Khwaeng" Khun Nan (ขุนน่าน), which was converted into the district Lae (และ) in 1914. In 1961 it was renamed Thung Chang, as the district office had been moved to "tambon" Thung Chang. 
Geography.
Neighboring districts are, from the east clockwise, Chaloem Phra Kiat, Pua, Chiang Klang and Song Khwae of Nan Province. To the north is Xaignabouli of Laos.
The eastern part of the district is in the Luang Prabang Range of the Thai highlands.
Administration.
Central administration.
Thung Chang is divided into four sub-districts ("tambons"), which are further subdivided into 40 administrative villages ("mubans").
Local administration.
There are two sub-district municipalities ("thesaban tambons") in the district:
There are three sub-district administrative organizations (SAO) in the district: