Melbourne’s urban area spans approximately 2,704 km², making it the largest city in Australia and the 33rd largest in the world. At its heart lies the Hoddle Grid, a compact street network about 1 by 0.5 miles (1.61 by 0.80 km), forming the nucleus of the central business district (CBD) along the southern bank of the Yarra River. Adjacent areas such as Southbank and Docklands have developed into functional extensions of the CBD, featuring modern office, commercial, and public developments. The city’s network of historic lanes and arcades, including Block Arcade and Royal Arcade, adds unique character to the urban landscape.

The CBD is Australia’s most densely populated area, with roughly 19,500 residents per square kilometre, and boasts the country’s tallest and most numerous skyscrapers. The tallest building currently is Australia 108 in Southbank, while the upcoming Southbank By Beulah (“Green Spine”) is projected to surpass it upon completion. Significant historic landmarks in and around the CBD include the Royal Exhibition Building, Melbourne Town Hall, and Parliament House. Despite being the central business hub, the demographic centre of Melbourne is actually located southeast in Camberwell, reflecting the city’s extensive suburban sprawl.

Melbourne’s urban form reflects the early 20th-century ideal of a “quarter-acre home and garden” for every family, popularly known as the Australian Dream. Coupled with the rise of private automobile ownership after 1945, this led to Melbourne’s auto-centric middle and outer suburbs, characterised by low-density housing. Inner-city areas, by contrast, are medium-density and transit-oriented, while the city centre, Docklands, St. Kilda Road, and Southbank feature high-density urban development.

The city is widely recognised as Australia’s garden city, with Victoria known as the garden state. Melbourne contains an abundance of parks and gardens, both within the CBD and surrounding suburbs, many featuring rare plant species, landscaped vistas, pedestrian pathways, and tree-lined avenues. Outer areas include national parks such as Mornington Peninsula, Port Phillip Heads Marine, Point Nepean, Organ Pipes, and Dandenong Ranges, alongside numerous state parks. Melbourne’s metropolitan area is formally divided into hundreds of suburbs, managed through 31 local government areas. This structure reflects a balance between high-density urban living, suburban expansion, and a commitment to green space, making Melbourne both a modern metropolis and a city celebrated for its natural and landscaped environments.