Sir Sidney John Saint CMG OBE FRSC (16 September 1897[1] – 15 June 1987) was an English agricultural chemist who spent most of his working life in Barbados, where he was Director of Agriculture, Controller of Supplies, a member of the island's Executive Council, and a Privy Counsellor.
Saint was educated at Beaminster Grammar School in Dorset and the University of Reading, where he graduated MSc.
He held a Salter research fellowship for two years from 1920, then was a lecturer in Agricultural Chemistry at the University of Leeds from 1922 to 1927.
While Director, he was also chairman of the British West Indies Sugar Cane Breeding Station.
He was President of the Barbados Museum and Historical Society, 1946 to 1959 and one of it Journal's (JBMHS) earliest editors.