| Official Name: | Sai Thong Watthana |
| Native Name: | ทรายทองวัฒนา |
| Native Name Lang: | th |
| Settlement Type: | District |
| Subdivision Type: | Country |
| Subdivision Name: | Thailand |
| Subdivision Type1: | Province |
| Subdivision Name1: | Kamphaeng Phet |
| Subdivision Type2: | Seat |
| Subdivision Name2: | Thung Sai |
| Subdivision Type3: | Subdistrict |
| Subdivision Type4: | Muban |
| Established Title: | District established |
| Population Total: | 23971 |
| Population As Of: | 2005 |
| Blank Name Sec1: | Postal code |
| Blank Info Sec1: | 62190 |
| Blank Name Sec2: | Geocode |
| Blank Info Sec2: | 6208 |
| Timezone: | ICT |
| Utc Offset: | +7 |
| Coordinates: | 16.3122°N 99.8311°W |
Sai Thong Watthana (Thai: ทรายทองวัฒนา, in Thai pronounced as /sāːj tʰɔ̄ːŋ wát.tʰā.nāː/) 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.[1] Originally named Thung Sai after the central tambon, it was renamed Sai Thong Watthana in 1995.[2] It was upgraded to a full district on 11 October 1997.[3]
The district Sai Thong Watthana is subdivided into 3 subdistricts (Tambon), which are further subdivided into 38 administrative villages (Muban).
| No. | Name | Thai | Villages | Pop.[4] | |
|---|---|---|---|---|---|
| 1. | Thung Sai | Thai: ทุ่งทราย | 17 | 9,509 | |
| 2. | Thung Thong | Thai: ทุ่งทอง | 11 | 7,268 | |
| 3. | Thawon Watthana | Thai: ถาวรวัฒนา | 10 | 6,632 |
There is one subdistrict municipality (Thesaban Tambon) in the district:
There are 2 subdistrict administrative organizations (SAO) in the district: