Gaillard III de Durfort

Gaillard III de Durfort (, ; fl. 1414–1442 ) was a Gascon nobleman of the Durfort family. He inherited the lordship of Duras and Blanquefort from his father, Gaillard II, in 1422. In the Hundred Years' War between England and France, Gaillard took the side of the English king, who was the feudal suzerain of Gascony. In 1434, he served as seneschal of the Landes for the English. In 1436, he signed a contract to fight as an ally (allié) of John I, Count of Foix, and his son, Gaston IV, themselves major supporters of Henry VI. Her surname may be spelled de la Lande or de Lalande. and had one son, Gaillard IV, who spent his childhood in London.

Gaillard III is last mentioned in a document of 1442 and he was dead by 1444.