Ermengarde of Anjou (c. 1018 – 18 March 1076), known as Blanche, was a Duchess consort of Burgundy. She was the daughter of Count Fulk III of Anjou and Hildegarde of Sundgau.^[1] She was sometimes known as Ermengarde-Blanche.^[1]

She married Geoffrey II, Count of Gâtinais c. 1035 (in French Geoffroy), called Ferréol and sometimes known as Aubri, seigneur de Château-Landon.^[1] Together they had:

• Hildegarde de Château-Landon, married c.1060 to Joscelin I, Lord of Courtenay^[2]
• Geoffrey III, Count of Anjou^[1]
• Fulk IV, Count of Anjou^[1]

Geoffrey II died sometime between 1043 and 1046, and Ermengarde's mother died while on pilgrimage to Jerusalem in 1046.

Ermengarde married Robert I, Duke of Burgundy in 1046,^[3] conferring on her the title Duchess of Burgundy. They had:

• Hildegarde (c. 1056–1104), who married Duke William VIII of Aquitaine around 1067^[4]

Ermengarde died 18 March 1076, at the Church of Fleurey-sur-Ouche.^[5]