Buchan is a town in the east Gippsland region of Victoria, Australia. The town is situated adjacent to the Buchan River, in the Shire of East Gi…Buchan is a town in the east Gippsland region of Victoria, Australia. The town is situated adjacent to the Buchan River, in the Shire of East Gippsland, upstream from the river's junction with the Snowy River. At the 2011 census, Buchan and the surrounding area had a population of 385. The town is most well known for the limestone Buchan Caves.