Australians are piling in to Melbourne's central business district at a record rate. The latest regional population count shows the number of residents living within the CBD jumped an unprecedented 5400 in the year to June 2013, a growth rate of 23 per cent.

The Docklands and Southbank were not far behind, each with growth rates of 15 per cent.

The extraordinary boom has made the statistical division of Melbourne City the nation's fastest growing. Melbourne City encompasses the CBD, the Docklands, Southbank, North Melbourne, Carlton, Parkville, East Melbourne, South Yarra, and Kensington. It's growth rate of 10.5 per cent eclipses Gungahlin in the Australian Capital Territory (8 per cent) and Serpentine and Armadale in Perth (6 per cent). The fifth fastest growing region in Australia is Wyndham in Melbourne's south-west (6 per cent).

Although extreme, the packing of Melbourne's CBD is part of an Australia-wide trend.