Heidelberg is a suburb of Melbourne, Victoria, Australia, 11 kilometres northeast of Melbourne's central business district, located within the City of Banyule local government area. Heidelberg recorded a population of 7,360 at the 2021 census. Once a large town on Melbourne's outskirts, Heidelberg was absorbed into Melbourne as part of the latter's northward expansion after World War II. Heidelberg once had its own historic central business district including its own municipality in the former City of Heidelberg.