Frankston City is situated on the eastern shores of Port Phillip Bay approximately 40 kilometres south of Melbourne. The municipality covers an area of about 131 square kilometres from Seaford Wetlands in the north, to Mt Eliza in the south, and the Western Port Highway in the east. The western boundary of the City is made up of about 10 kilometres of coastline along Port Phillip Bay.
Frankston City is strategically placed as the activity centre for the Mornington Peninsula and the nearby south-east growth corridor of Melbourne. Currently, Frankston City provides regional shopping, education, health, community service, financial, recreation and leisure and entertainment facilities for a population catchment far greater than its municipal boundaries.