Lake Macquarie is Australia's largest coastal lagoon. Located in the City of Lake Macquarie and Central Coast Council local government areas in the Hunter and Central Coast regions of New South Wales, Australia, it covers an area of 110 square kilometres (42.5 sq mi) and is connected to the Tasman Sea by a short channel. Most of the residents of the City of Lake Macquarie live near the shores of the lagoon.

Toronto is a lakeside suburb within the City of Lake Macquarie, Greater Newcastle in New South Wales, Australia, approximately 28 kilometres (17 mi) from Newcastle's central business district and is a commercial hub for the sprawling suburbs on the western shore of the lake. It is one of the major centres in the City of Lake Macquarie.