Geoffrey I of Villehardouin

Geoffrey I of Villehardouin (French: Geoffroi I de Villehardouin) (c. 1169 – c. 1229) was a French knight from the County of Champagne who joined the Fourth Crusade. He participated in the conquest of the Peloponnese and became the second prince of Achaea (1209/1210–c. 1229).

Under his reign, the Principality of Achaea became the direct vassal of the Latin Empire of Constantinople. He extended the borders of his principality.