Robert, Rob, Robbie, or Bob Buchanan may refer to:
Sports Robert Buchanan (footballer, born 1867) (1867–1909), Scottish footballer Robert Buchanan (footballer, born 1887) (1887–?), Scottish footballer Bob Buchanan (baseball) (born 1961), American baseball player Robbie Buchanan (born 1996), Scottish footballer Bob Buchanan (curler), American curler
Others Robert Buchanan (playwright) (1785–1873), Scottish minister and professor of logic and rhetoric at the University of Glasgow Robert Buchanan (minister) (1802–1875), Moderator of the General Assembly of the Free Church of Scotland 1860/61 Robert C. Buchanan (1811–1878), American military officer Robert Buchanan (Owenite) (1813–1866), Scottish socialist writer, lecturer and journalist Robert Williams Buchanan (1841–1901), Scottish writer, son of Robert Buchanan the Owenite Robert Earle Buchanan (1883–1973), American bacteriologist Robert D. Buchanan (born 1931), American creator of several animated TV shows Robert Buchanan (actor) (born 1962), Scottish actor Robert Joseph Buchanan, American neurosurgeon, psychiatrist, and bioethicist