Dederang is a town in north east Victoria. The town is located on the Kiewa Valley Highway, in the Alpine Shire Local government in Austr…Dederang is a town in north east Victoria. The town is located on the Kiewa Valley Highway, in the Alpine Shire Local government in Australia, 329 kilometres from the state capital, Melbourne. Dederang is located in the Kiewa River valley. At the 2006 census, Dederang and the surrounding area had a population of 422.