Ercildoune originates from the Gaelic Arciol Dun and may refer to:
Ercildoune, Footscray, a former bank building in Melbourne, Victoria, Australia Ercildoune, Victoria, a locale in the Grampians region of Victoria, Australia Ercildoun (homestead), a homestead and former pastoral property near the local of Ercildoune Ercildoune, 85 Elizabeth Bay Road, a house in Sydney, Australia, designed by Harry Seidler Arcioldun, the historical name for Earlston, a town in Scotland