Mary Fiennes (1495–1531) was an English courtier. She was the wife of Henry Norris. Norris was executed for treason as one of the alleged lovers of her cousin, Anne Boleyn, the second wife of King Henry VIII of England. Mary lived for six years at the French court as a Maid of Honour to queens consort Mary Tudor, wife of Louis XII; and Claude of France, wife of Francis I.