Sunbury is a regional city, located 40.4 kilometres (25.1 mi) north-west of Melbourne's central business district, in the state of Victoria, Australia. Its Local Government Area is the City of Hume. At the 2006 Census, Sunbury had a population of 31,000. Statistically, Sunbury is considered part of Greater Melbourne.
Although Sunbury is currently a separate city close to Melbourne, the Victorian government's 2009 decision to extend the urban growth boundary will likely see Sunbury absorbed by Melbourne's suburban expansion around 2020.