Melbourne is the capital and most populous city of the Australian state of Victoria, and the second-most populous city in Australia, after Sydne…Melbourne is the capital and most populous city of the Australian state of Victoria, and the second-most populous city in Australia, after Sydney. Its name generally refers to a 9,993 km² metropolitan area also known as Greater Melbourne, comprising an urban agglomeration of 31 local government areas. The name is also used to specifically refer to the local government area named City of Melbourne, whose area is centred on the Melbourne central business district and some immediate surrounds.