Sai Thong Watthana District  Sai Thong Watthana (, ) is a district ("amphoe") of Kamphaeng Phet Province, central Thailand. Neighbouring districts are (from the south clockwise): Bueng Samakkhi, Khlong Khlung, and Sai Ngam of Kamphaeng Phet Province; and Sam Ngam of Phichit Province. The minor district ("king amphoe") was established on 1 April 1992 by splitting off three "tambons" from Khlong Khlung District. Originally named Thung Sai after the central "tambon", it was renamed Sai Thong Watthana in 1995. It was upgraded to a full district on 11 October 1997. The district is divided into three subdistricts ("tambons"), which are further subdivided into 37 villages ("mubans"). There are no municipal ("thesaban") areas, and three tambon administrative organizations (TAO).