Middle Harbour was an electoral district for the Legislative Assembly in the Australian state of New South Wales, named after Middle Harbour, Sydney. It was first created in 1904, partly replacing Warringah and Willoughby. In 1920, with the introduction of proportional representation, it was absorbed into North Shore. It was recreated in 1988, replacing Willoughby, and abolished in 1991, being replaced by Willoughby.
References
Electoral district of Middle Harbour Wikipedia(Text) CC BY-SA