| Tư Nghĩa district | |
| Settlement Type: | District |
| Native Name: | Huyện Tư Nghĩa |
| Subdivision Type: | Country |
| Subdivision Type1: | Region |
| Subdivision Name1: | South Central Coast |
| Subdivision Type2: | Province |
| Subdivision Name2: | Quảng Ngãi province |
| Seat Type: | Capital |
| Seat: | La Hà |
| Unit Pref: | Imperial |
| Area Total Km2: | 227 |
| Population As Of: | 2003 |
| Population Total: | 178,132 |
| Timezone: | UTC + 7 |
| Utc Offset: | +7 |
Tư Nghĩa is a rural district (huyện) of Quảng Ngãi province in the South Central Coast region of Vietnam. As of 2003 the district had a population of 178,132.[1] The district covers an area of 227 km2. The district capital lies at La Hà.[1]