Launceston (lônˈsĕstən, lŏnˈ–) [key], city (1991 pop. 66,747), on Tasmania, SE Australia, where the North Esk and South Esk rivers join to form the Tamar estuary; founded 1806. Launceston is the second most populous city in Tasmania and the main port for trade with the Australian mainland. The principal exports are dairy products, flour, and lumber. There are woolen mills and aluminum works. The city has teacher-training and technical schools.