Geoffrey II, de Château-Landon (died 1043 or 1046) was the Count of Gâtinais.
[1][2] He was the son of Hugues du Perche, Count of Gâtinais, by Béatrice de Mâcon, the daughter of Aubry II de Mâcon.
[3] About 1035 he married Ermengarde of Anjou, Duchess of Burgundy, daughter of Fulk III, Count of Anjou.
[2][4] After Geoffrey's death she married secondly Robert I, Duke of Burgundy.
[1] Together, Geoffrey and Ermengarde had: