| Official Name: | Wang Sai Phun |
| Native Name: | วังทรายพูน |
| Native Name Lang: | th |
| Settlement Type: | Amphoe |
| Subdivision Type: | Country |
| Subdivision Name: | Thailand |
| Subdivision Type1: | Province |
| Subdivision Name1: | Phichit |
| Subdivision Type2: | Seat |
| Subdivision Name2: | Nong Phra |
| Subdivision Type3: | Tambon |
| Subdivision Type4: | Muban |
| Established Title: | Amphoe established |
| Population Total: | 25541 |
| Population As Of: | 2005 |
| Blank Name Sec1: | Postal code |
| Blank Info Sec1: | 66180 |
| Blank Name Sec2: | Geocode |
| Blank Info Sec2: | 6602 |
| Timezone: | ICT |
| Utc Offset: | +7 |
| Coordinates: | 16.3883°N 100.5383°W |
Wang Sai Phun (Thai: วังทรายพูน, in Thai pronounced as /wāŋ sāːj pʰūːn/) is a district (amphoe) in the eastern part of Phichit province, central Thailand.
Tambon Wang Sai Phun, Nong Phra and Nong Pla Lai were separated from Mueang Phichit District and made up the new minor district (king amphoe) Wang Sai Phun on 1 August 1975.[1] It was upgraded to a full district on July 13, 1981.[2] The government assigned Tambon Nong Plong of Mueang Phichit to be part of Wang Sai Phun on 23 September 1993.[3]
Neighboring districts are (from the south clockwise) Thap Khlo, Taphan Hin, Mueang Phichit, Sak Lek of Phichit Province and Noen Maprang of Phitsanulok province.
The district is divided into four sub-districts (tambon), which are further subdivided into 57 villages (muban). Wang Sai Phun is a township (thesaban tambon) which covers parts of tambon Wang Sai Phun and Nong Phra. There are a further four tambon administrative organizations (TAO).
| No. | Name | Thai name | Villages | Pop. | ||
|---|---|---|---|---|---|---|
| 1. | Wang Sai Phun | วังทรายพูน | 14 | 8,899 | ||
| 2. | Nong Pla Lai | หนองปลาไหล | 16 | 5,163 | ||
| 3. | Nong Phra | หนองพระ | 17 | 8,006 | ||
| 4. | Nong Plong | หนองปล้อง | 10 | 3,473 |