It has an area of 130 square kilometres, and in August 2021, the City of Frankston recorded a population of 139,281.

[2] Some changes occurred between the release of the Local Government Board report in July and the actual amalgamation – the original plan was to merge with the City of Chelsea and take Braeside and Carrum Downs from the City of Springvale.

However, Frankston City Council submitted that it should expand eastwards instead, as well as taking Mount Eliza and Baxter.

[6] By October, the present boundaries had been agreed upon, but the new entity was to be known as the City of Nepean.

[7][8] Despite this recommendation, the State Government ultimately decided to retain a variation of the historical name, designating the new entity as Frankston City.