Great Western is a town in the east of the Wimmera region of Victoria, Australia. The town is located on the Western Highway, in the Shire o…Great Western is a town in the east of the Wimmera region of Victoria, Australia. The town is located on the Western Highway, in the Shire of Northern Grampians local government area, 225 kilometres north west of the state capital, Melbourne. The town has a population of 425.