Sir Robert de Umfraville KG, Lord of Redesdale (c. 1363 – 1437) was a knight in late-medieval England who took part in the later stages of the Hundred Years' War, particularly against Scotland. The de Umfraville family had been influential in northeast England for centuries and also held major estates in Yorkshire. His ancestors were mormaers of Angus, and his nephew married into the Percies, a powerful local marcher family with whom de Umfraville was closely associated. Much of Sir Robert's career continued on the same path as his ancestors, being primarily focused on defending the border with Scotland, which had been in a state of near-permanent warfare since the late thirteenth century.