Dunwich is a town and locality on the western side of North Stradbroke Island in Queensland, Australia. Dunwich is part of the Redland City local government area, administered from the bayside town of Cleveland on the Queensland mainland. In the 2016 census, Dunwich had a population of 864 people.

North Stradbroke Island, colloquially Straddie or North Straddie, is an island that lies within Moreton Bay in the Australian state of Queensland, 30 kilometres (19 mi) southeast of the centre of Brisbane. Originally there was only one Stradbroke Island but in 1896 it split into North Stradbroke Island and South Stradbroke Island separated by the Jumpinpin Channel. The Quandamooka people are the traditional owners of North Stradbroke island.