Melbourne is in Australia.
Melbourne ( [ ˈmɛlbərn ] ) is the capital and most populous city of the Australian state of Victoria , and the second-most populous city in Australia and Oceania . It is home to many of Australia 's largest and oldest cultural institutions such as the Melbourne Cricket Ground , the National Gallery of Victoria , the State Library of Victoria and the UNESCO World Heritage-listed Royal Exhibition Building . The main passenger airport serving the metropolis and the state is Melbourne Airport ( also called Tullamarine Airport ) , the second busiest in Australia .