Cranbourne is a suburb in Melbourne, Victoria, Australia, 43 km south-east of Melbourne's central business district. Its local government area is the City of Casey. At the 2011 Census, Cranbourne had a population of 18,622.The greater Cranbourne area consists of Cranbourne, Cranbourne North, Cranbourne East, Cranbourne South, Cranbourne West. Some suburbs and townships that surround Cranbourne are Narre Warren South, Devon Meadows, Langwarrin, Clyde, and Junction Village.