Saint Ralph Sherwin (1550 – 1 December 1581) was an English Roman Catholic martyr and saint. He was born at Rodsley, Derbyshire, and was educated at Eton College. In 1568, he was nominated by Sir William Petre to one of the eight fellowships which he had founded at Exeter College, Oxford, probably influenced by Sherwin's uncle, John Woodward, who from 1556 to 1566 had been rector of Ingatestone, Essex, where Petre lived.