| Official Name: | Phu Sing |
| Native Name: | ภูสิงห์ |
| Native Name Lang: | th |
| Settlement Type: | District |
| Subdivision Type: | Country |
| Subdivision Name: | Thailand |
| Subdivision Type1: | Province |
| Subdivision Name1: | Sisaket |
| Subdivision Type2: | Seat |
| Subdivision Name2: | Huai Tuekchu |
| Subdivision Type3: | Subdistrict |
| Subdivision Type4: | Muban |
| Established Title: | District established |
| Population Total: | 50585 |
| Population As Of: | 2005 |
| Blank Name Sec1: | Postal code |
| Blank Info Sec1: | 33140 |
| Blank Name Sec2: | Geocode |
| Blank Info Sec2: | 3317 |
| Timezone: | ICT |
| Utc Offset: | +7 |
| Coordinates: | 14.5467°N 104.1317°W |
Phu Sing (Thai: ภูสิงห์, in Thai pronounced as /pʰūː sǐŋ/) is a district (amphoe) in the southwestern part of Sisaket province, northeastern Thailand.
The minor district (king amphoe) was created on 1 April 1991, when the six tambons Khok Tan, Huai Ta Mon, Huai Tuekchu, Lalom, Takhian Ram, and Dong Rak were split off from Khunkhan district.[1] It was upgraded to a full district on 8 September 1995.[2]
The district is bounded in the south by the Dangrek Range. Neighboring districts are (from the west clockwise): Buachet of Surin province, Khukhan, and Khun Han of Sisaket Province, and Oddar Meancheay of Cambodia.
The district is divided into seven sub-districts (tambons), which are further subdivided into 85 villages (mubans). There are no municipal (thesaban) areas, and seven tambon administrative organizations (TAO).
| No. | Name | Thai name | Villages | Pop. | ||
|---|---|---|---|---|---|---|
| 1. | Khok Tan | โคกตาล | 13 | 7,324 | ||
| 2. | Huai Ta Mon | ห้วยตามอญ | 10 | 6,212 | ||
| 3. | Huai Tuekchu | ห้วยตึ๊กชู | 18 | 11,313 | ||
| 4. | Lalom | ละลม | 13 | 7,554 | ||
| 5. | Takhian Ram | ตะเคียนราม | 14 | 5,928 | ||
| 6. | Dong Rak | ดงรัก | 8 | 5,770 | ||
| 7. | Phrai Phatthana | ไพรพัฒนา | 9 | 6,484 |