Kalkallo is an outer suburb of Melbourne, Victoria, Australia, 31 km north of Melbourne's central business district, located within the City of Hume local government area. Kalkallo recorded a population of 5,548 at the 2021 census. Located on the Hume Freeway, Kalkallo had, until the 2010s, a few streets, a service station and a pub. It was formerly surrounded by farms that were not yet consumed by the urban sprawl of Melbourne.