| Official Name: | Si Wilai |
| Native Name: | ศรีวิไล |
| Settlement Type: | Subdistrict |
| Pushpin Map: | Thailand |
| Subdivision Type: | Country |
| Subdivision Name: | Thailand |
| Subdivision Type2: | Province |
| Subdivision Name2: | Bueng Kan |
| Subdivision Type3: | District |
| Subdivision Name3: | Si Wilai |
| Population As Of: | 2010 |
| Population Total: | 10,846 |
| Timezone: | ICT |
| Utc Offset: | +7 |
| Coordinates: | 18.1811°N 103.7436°W |
| Postal Code Type: | Postal code |
| Blank Name: | TIS 1099 |
Si Wilai (Thai: ศรีวิไล) is subdistrict (tambon) in Si Wilai District, in Bueng Kan Province, northeastern Thailand. It is the seat of Si Wilai District. As of 2010, it had a population of 10,846 people and jurisdiction over 12 villages.[1] It lies on Thailand Route 222, south of Non Sombun and Bueng Kan.[2] A bus service connects it to Bueng Kan.[3]