The City of Hobsons Bay is a local government area in Melbourne, Victoria, Australia. It comprises the south-western suburbs between 6 and 20 km from the Melbourne city centre.
It was founded on 22 June 1994 during the amalgamation of local councils by the state government from the City of Williamstown and the City of Altona, as well as the suburb of South Kingsville from the City of Footscray. It took its name from Hobsons Bay, named after Captain William Hobson. The city has an area of 64 square kilometres, and in June 2018 had a population of 96,470.