| Nga Sơn | |
| Settlement Type: | Township (Class-5) |
| Official Name: | Nga Sơn township |
| Native Name: | Thị trấn Nga Sơn |
| Pushpin Map: | Vietnam |
| Subdivision Type: | Country |
| Subdivision Type1: | Region |
| Subdivision Name1: | North Central Coast |
| Subdivision Type2: | Province |
| Subdivision Name2: | Thanh Hóa |
| Subdivision Type3: | District |
| Subdivision Name3: | Nga Sơn |
| Unit Pref: | Imperial |
| Timezone: | UTC + 7 |
| Utc Offset: | +7 |
| Coordinates: | 20.0075°N 105.9706°W |
Nga Sơn is a township (Vietnamese: thị trấn) and capital of Nga Sơn District, Thanh Hóa Province, Vietnam.[1]