| Quỳnh Nhai district | |
| Settlement Type: | District |
| Native Name: | Huyện Quỳnh Nhai |
| Subdivision Type: | Country |
| Subdivision Type1: | Region |
| Subdivision Name1: | Northwest |
| Subdivision Type2: | Province |
| Subdivision Name2: | Sơn La province |
| Seat Type: | Capital |
| Seat: | Quỳnh Nhai |
| Unit Pref: | Imperial |
| Area Total Km2: | 1049 |
| Population As Of: | 2003 |
| Population Total: | 62,189 |
| Timezone: | UTC + 7 |
| Utc Offset: | +7 |
Quỳnh Nhai is a district (huyện) of Sơn La province in the Northwest region of Vietnam.
As of 2003 the district had a population of 62,189.[1] The district covers an area of 1,049 km². The district capital lies at Quỳnh Nhai.[1]