Sir Eric Alexander Buchanan, 3rd Baronet (19 August 1848 – 29 July 1928) was the 3rd Baronet Buchanan of Dunburgh.
Sir Andrew Buchanan, 1st Baronet and Frances Katharine Mellish.
He was educated at Wellington College, Berkshire.
He married Constance Augusta Tennant, daughter of Charles Edmund Tennant RN of Needwood House, Burton-on-Trent, on 27 June 1898.
The children from the marriage were: He succeeded to the title of 3rd Baronet Buchanan of Dunburgh on 16 October 1901.