Wiang Sa District, Surat Thani

Wiang Sa is a district of Surat Thani Province, Thailand.GeographyWiang Sa is in the southeast Surat Thani Province. Neighboring districts are (from the west clockwise) Phrasaeng, Khian Sa, and Ban Na San of Surat Thani, and Phipun, Chawang, and Tham Phannara of Nakhon Si Thammarat Province.The Tapi River forms the western boundary of the district. Smaller rivers within the district are Khlong Nam Thao, Khlong Tan and Khlong Chanuan. While to the west the terrain descends to the Tapi plain, to the east are the hills of the Nakhon Si Thammarat mountain range.In the northeast of the district is Tai Romyen National Park.HistoryWiang Sa originated as a minor city-state under the control of Nakhon Si Thammarat after the Srivijaya times. It was converted into a district named Khlong Tan during the thetsaban reforms at the end of the 19th century. In 1896 Wiang Sa was reduced to a tambon within Lamphun District, the current Ban Na San District. On 10 March 1968 Wiang Sa became a minor district by splitting off tambon Wiang Sa and Thung Luang from Ban Na San District. On 17 November 1971 it was upgraded to full district status.