| Official Name: | Wat Sing |
| Native Name: | วัดสิงห์ |
| Native Name Lang: | th |
| Settlement Type: | District |
| Subdivision Type: | Country |
| Subdivision Name: | Thailand |
| Subdivision Type1: | Province |
| Subdivision Name1: | Chai Nat |
| Subdivision Type2: | Seat |
| Subdivision Name2: | Makham Thao |
| Established Title: | District established |
| Population Total: | 26389 |
| Population As Of: | 2008 |
| Blank Name Sec1: | Postal code |
| Blank Info Sec1: | 17120 |
| Blank Name Sec2: | Geocode |
| Blank Info Sec2: | 1803 |
| Timezone: | ICT |
| Utc Offset: | +7 |
| Coordinates: | 15.2553°N 100.0381°W |
Wat Sing (pronounced as /th/) is a district (amphoe) in the northern part of Chai Nat province, central Thailand.
Neighboring districts are (from the northeast clockwise) Manorom, Mueang Chai Nat, Hankha and Nong Mamong of Chai Nat Province; Nong Khayang and Mueang Uthai Thani of Uthai Thani province.
The district is divided into seven sub-districts (tambons), which are further subdivided into 47 villages (mubans). Wat Sing is a sub-district municipality (thesaban tambon) which covers tambon Wat Sing. There are a further six tambon administrative organizations (TAO).
| No. | Name | Thai | Villages | Pop.[1] | |
|---|---|---|---|---|---|
| 1. | Wat Sing | วัดสิงห์ | - | 4,028 | |
| 2. | Makham Thao | มะขามเฒ่า | 11 | 5,174 | |
| 3. | Nong Noi | หนองน้อย | 8 | 3,744 | |
| 4. | Nong Bua | หนองบัว | 5 | 2,755 | |
| 6. | Nong Khun | หนองขุ่น | 8 | 3,443 | |
| 7. | Bo Rae | บ่อแร่ | 7 | 2,886 | |
| 11. | Wang Man | วังหมัน | 8 | 4,359 |