Tư Nghĩa (listenⓘ) 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.

This article about a location in Quảng Ngãi Province, Vietnam is a stub.