Altona is a suburb in Melbourne, Victoria, Australia, 13 km (8.1 mi) south-west of Melbourne’s Central Business District, located within the City of Hobsons Bay local government area. Altona recorded a population of 11,490 at the 2021 census.

Altona has two railway stations; Altona and Westona, both of which are on the Altona Loop. This is one of the two lines that runs between Newport and Laverton stations (the other being a Newport direct Express to Laverton track that operates along the former Geelong railway line, located along the northern boundary of Altona). Early morning and late night services to Werribee, as well as all weekend services, run via the Altona loop. At other times, the Altona loop is serviced by Laverton services.