People educated at Aberdeen Grammar School

John James Rickard Macleod, (6 September 1876 – 16 March 1935), was a Scottish biochemist and physiologist. He devoted his career to diverse topics in physiology and biochemistry, but was chiefly interested in carbohydrate metabolism. He is noted for his role in the discovery and isolation of insulin during his tenure as a lecturer at the University of Toronto, for which he and Frederick Banting received the 1923 Nobel prize in Physiology or Medicine.

Andrew John Maxton Cruickshank (25 December 1907 in Aberdeen, Aberdeenshire – 29 April 1988 in London) was a Scottish actor, most famous for his portrayal of Dr Cameron in the long-running UK BBC television series Dr. Finlay's Casebook, which ran for 191 episodes from 1962 until 1971.

Tom Buchan (1931–1995) Scottish poet, novelist and playwright/dramatist.