Wiang Sa is a district (Amphoe

Amphoe

An amphoe is the second level administrative subdivision of Thailand. Usually translated as district, amphoe make up the provinces, and are analogous to a county seat...

) in the central part of Nan Province

Nan Province

Nan is one of the northern provinces of Thailand. Neighboring provinces are Uttaradit, Phrae and Phayao. To the north and east it borders Sainyabuli of Laos.-Geography:...

, northern Thailand

Thailand

Thailand , officially the Kingdom of Thailand , formerly known as Siam , is a country located at the centre of the Indochina peninsula and Southeast Asia. It is bordered to the north by Burma and Laos, to the east by Laos and Cambodia, to the south by the Gulf of Thailand and Malaysia, and to the...

.

Geography

Neighboring are from the south clockwise Na Noi

Amphoe Na Noi

-History:Na Noi was originally named Wiang Si Sa Ket . In 1899 it became part of the province Nan. Though it was originally planned to merge Sisaket and Tha Pla into one district, in 1903 Tha Plan was integrated into Uttaradit Province...

 of Nan Province, Rong Kwang

Amphoe Rong Kwang

Rong Kwang is a district in the northeastern part of Phrae Province, northern Thailand.-Geography:Neighboring districts are Mueang Phrae, Nong Muang Khai, Song of Phrae Province, Wiang Sa, Na Noi and Na Muen of Nan Province.-History:The minor district Rong Kwang was upgraded to a full district in...

, Song

Amphoe Song

Song is the northernmost district of Phrae Province, northern Thailand.-Geography:Neighboring districts are Rong Kwang, Nong Muang Khai, Long of Phrae Province, Mae Mo, Ngao of Lampang Province, Dok Khamtai, Chiang Muan of Phayao Province, Ban Luang and Wiang Sa of Nan Province.The Mae Yom...

 of Phrae Province

Phrae Province

Phrae is one of the northern provinces of Thailand. Neighboring provinces are Phayao, Nan, Uttaradit, Sukhothai and Lampang.-Geography:Phrae is located in the valley of the river Yom.-History:...

, Ban Luang

Amphoe Ban Luang

Ban Luang is a district in the western part of Nan Province, northern Thailand.-History:Originally the area was Tambon Suat of Mueang Nan district. It was created to be Ban Luang minor district on May 15, 1975, when the three tambon Pa Kha Luang, Suat and Ban Phi were split off from Mueang...

, Mueang Nan

Amphoe Mueang Nan

Mueang Nan is the capital district of Nan Province, northern Thailand.-History:The district was Khwaeng Nakhon Nan, set up in 1899 by the Ministry of Interior. It was renamed to Mueang Nan district in 1917...

, Phu Phiang and Mae Charim

Amphoe Mae Charim

Mae Charim is a district in the eastern part of Nan Province, northern Thailand.-History:Mae Charim was originally known as Bowa . The minor district Mae Charim was established on October 1 1969 with the three tambon Phong, Nong Daeng and Mo Mueang split off from Mueang Nan district...

 of Nan Province again. And to the east it borders Xaignabouli Province of Laos

Laos

Laos Lao: ສາທາລະນະລັດ ປະຊາທິປະໄຕ ປະຊາຊົນລາວ Sathalanalat Paxathipatai Paxaxon Lao, officially the Lao People's Democratic Republic, is a landlocked country in Southeast Asia, bordered by Burma and China to the northwest, Vietnam to the east, Cambodia to the south and Thailand to the west...

.

History

The minor district Mueang Sa was created in 1908, consisting of the seven tambon Mueang Sa, Ai Na Lai, Ban San, Ban Khueng, Pong Sanuk, Nam Khao and Lai Na split off from Mueang Nan district. 1909 it was upgraded to a full district. In 1917 it was renamed to Phun Yuen (บุญยืน), as the district office was located in that tambon. In 1939 it was named back to its historical name, only leaving out the word Mueang which was reserved for the capital districts of provinces. The district was renamed to Wiang Sa on January 23 1986.

Administration

The district is subdivided into 17 subdistricts (tambon

Tambon

Tambon is a local government unit in Thailand. Below district and province , they form the third administrative subdivision level. As of the 2009 there are 7255 tambon, not including the 169 khwaeng of Bangkok, which are set at the same administrative level, thus every district contains 8-10 tambon...

), which are further subdivided into 126 villages (muban

Muban

Muban is the lowest administrative subdivision of Thailand. Usually translated as village, they are the subdivision of tambon. As of 2008, there are 74944 administrative villages in Thailand. As of the 1990 census, the average village consisted of 144 households or 746 persons.A muban does not...

). Klang Wiang is a township (thesaban tambon) and covers parts of tambon Klang Wiang. There are further 15 Tambon administrative organizations (TAO).

No.	Name	Thai name	Villages	Inh. Population A population is all the organisms that both belong to the same group or species and live in the same geographical area. The area that is used to define a sexual population is such that inter-breeding is possible between any pair within the area and more probable than cross-breeding with individuals...
1.	Klang Wiang	กลางเวียง	14	10,865
2.	Khueng	ขึ่ง	7	4,038
3.	Lai Nan	ไหล่น่าน	8	3,535
4.	Tan Chum	ตาลชุม	7	4,033
5.	Na Lueang	นาเหลือง	7	3,238
6.	San	ส้าน	10	7,208
7.	Nam Muap	น้ำมวบ	8	3,178
8.	Nam Pua	น้ำปั้ว	6	4,127
9.	Yap Hua Na	ยาบหัวนา	7	4,594
10.	Pong Sanuk	ปงสนุก	4	1,400
11.	Ai Na Lai	อ่ายนาไลย	11	6,946
12.	San Na Nong Mai	ส้านนาหนองใหม่	4	1,824
13.	Mae Khaning	แม่ขะนิง	7	3,576
14.	Mae Sakhon	แม่สาคร	6	2,615
15.	Chom Chan	จอมจันทร์	8	3,973
16.	Mae Sa	แม่สา	7	2,866
17.	Thung Si Thong	ทุ่งศรีทอง	5	2,326