A habitational surname from Scottish Gaelic from Scotland. • A male given name transferred from the surname. • A number of places in the United States: • An unincorporated community in Tuolumne County, California. • A small city, the county seat of Haralson County, Georgia. • An unincorporated community in Floyd County, Indiana. • An unincorporated community in Cedar County, Iowa. • A city and township in Berrien County, Michigan. • A village in the town of Cortlandt, Westchester County, New York. • A minor city in Stutsman County, North Dakota. • An unincorporated community in Harney County, Oregon. • An unincorporated community in Henry County, Tennessee. • A town in Botetourt County, Virginia. • A town in Outagamie County, Wisconsin. • A number of places elsewhere: • A locality in the City of Maitland and City of Cessnock, New South Wales, Australia. • A locality in Victoria Daly regional council area, Northern Territory, Australia. • A locality in Goyder regional council area, South Australia. • A rural municipality in eastern Saskatchewan, Canada; in full, the Rural Municipality of Buchanan No. 304. • A village in Saskatchewan within the rural municipalty. • The capital city of Grand Bassa County, Liberia, named after First Governor of Liberia Thomas Buchanan. • A historic parish in Stirlingshire, Scotland, which included Milton of Buchanan and Buchanan Smithy.