FitzRalph is a medieval Anglo-Norman patronymic surname meaning "son of Ralph". Notable people with the surname include:

Robert FitzRalph (died 1193), 12th-century Bishop of Worcester Richard FitzRalph (1300–1360), scholastic philosopher, theologian, and Norman Irish Archbishop of Armagh administrator William FitzRalph (1140–1200), High Sheriff of Nottinghamshire, Derbyshire and the Royal Forests

See also