Oakleigh is a suburb in Melbourne, Victoria, Australia 14 km south-east of Melbourne's Central Business District, located within the City of Monash local government area. Oakleigh recorded a population of 8,442 at the 2021 census. Once a large independent city, Oakleigh was absorbed into Melbourne as part of the eastward expansion of the metropolis in the 1950s. As a result, it once had its own large historic Central Business District, its own municipality in the former City of Oakleigh and its own suburbs.