| Official Name: | Na Saeng |
| Native Name: | นาแสง |
| Settlement Type: | Subdistrict |
| Subdivision Type: | Country |
| Subdivision Name: | Thailand |
| Subdivision Type2: | Province |
| Subdivision Name2: | Bueng Kan |
| Subdivision Type3: | District |
| Subdivision Name3: | Si Wilai District |
| Population As Of: | 2010 |
| Population Total: | 7,920 |
| Timezone: | ICT |
| Utc Offset: | +7 |
| Postal Code Type: | Postal code |
| Blank Name: | TIS 1099 |
Na Saeng is a sub-district (tambon) in Si Wilai District, in Bueng Kan Province, northeastern Thailand. As of 2010, it had a population of 7,920 people, with jurisdiction over nine villages.[1]