Seaholme is a suburb in Melbourne, Victoria, Australia, 12 km south-west of Melbourne's Central Business District, located within the City of Hobsons Bay local government area. Seaholme recorded a population of 2,067 at the 2021 census. Seaholme was the name of a housing estate developed in the early 1920s, which was marketed as the next stage of development of the adjoining suburb of Altona.