The Melbourne central business district (colloquially known as "the City" or "the CBD", and gazetted simply as Melbourne) is the city centre of Melbourne, Victoria, Australia. As of the 2021 census, the CBD had a population of 54,941, and is located primarily within the local government area City of Melbourne, with some parts located in the City of Port Phillip.
The central business district is centred on the Hoddle Grid, the oldest part of the city laid out in 1837. It also includes parts of the parallel and perpendicular streets to the north, bounded by Victoria Street and Peel Street; and extends south-east along much of the area immediately surrounding St Kilda Road.