Carrum Downs is a suburb in Melbourne, Victoria, Australia, 36 km south-east of Melbourne's Central Business District, located within the City of Frankston local government area. Carrum Downs recorded a population of 21,976 at the 2021 census. Prior to December 1994 the majority of Carrum Downs was within the City of Cranbourne. However, following statewide local government reform, the suburb was moved to be part of a new, larger City of Frankston.