Sir Jack Cecil Drummond FRIC, FRS (12 January 1891 – 4/5 August 1952) was a distinguished biochemist, noted for his work on nutrition as applied to the British diet under rationing during the Second World War.
He was murdered, together with his wife and 10-year-old daughter, in what became known as the Dominici affair, on the night of 4–5 August 1952 near Lurs, a village or commune in the Basses-Alpes department (now Alpes-de-Haute-Provence) of Southern France.