Trevallyn is a residential locality in the local government areas of Launceston and West Tamar in the Launceston LGA region of Tasmania. The locality is about 3 kilometres west of the city of Launceston. The 2016 census recorded a population of 4562 for the state suburb of Trevallyn. It is a suburb of Launceston.
Population: 4,562 (2016 census)
Established: 1890s
Location: 3 km (2 mi) W of Launceston
Postcode(s): 7250
LGA(s): West Tamar Council (75%), City of Launceston (25%)