The City of Shellharbour is a local government area in the Illawarra region of New South Wales, Australia. The City is located about 100 kilometres (62 mi) south of Sydney and covers the southern suburbs of the Wollongong urban area centred on Shellharbour and it had an estimated population of 68,460 at the 2016 census.

The area is bordered by the City of Wollongong to the north, with the boundary being the Lake Illawarra entrance (and the suburb of Lake Illawarra) and Macquarie Rivulet (Albion Park Rail). The Municipality of Kiama is to the south of the City of Shellharbour.