The District Council of Mobilong was a local government area in South Australia from 1884 to 1977.

[1] The first meeting was held on 12 July 1884 in the Murray Bridge Round House.

[3] By 1923, it comprised an area of approximately 700 square miles, including the Hundreds of Mobilong and Ettrick and parts of the Hundreds of Burdett and Brinkley, with the growing township of Murray Bridge having its own ward.

Its main industries were described as dairying, citrus, sheep and wool, with the district being advantaged by the development of irrigation settlements along the Murray River.

The rapid growth of Murray Bridge had seen the town expanding into the area controlled by the district council, and the associated development issues had strengthened arguments for amalgamation.