Frankston ( FRANK-stən) is a suburb in Melbourne, Victoria, Australia. Located 41 km (25 mi) south-east of the Melbourne city centre, it is in the local government area of the City of Frankston and serves as its administrative and activity centres.

According to the 2021 census there were 37,331 people in Frankston, with 1.5% being Indigenous Australian, 70.6% of people were born in Australia. The most common countries of foreign birth were England 5.1%, New Zealand 2.4%, China 1.2%, India 1.1% and the Philippines 0.9%.

Being one of the southernmost suburbs of the metropolitan area of Melbourne, as well as the gateway to the Mornington Peninsula, Frankston is extensively serviced by both railway and roadway. In particular, the Frankston railway line (named so because Frankston railway station is the last metropolitan station on the line) connects the suburb directly with the Melbourne city centre. The regional Stony Point railway line then runs from Frankston and connects it with the eastern suburbs and towns of the Shire of Mornington Peninsula.