Sandrine Piau (born 5 June 1965) is a French opera soprano. Born in Issy-les-Moulineaux, she originally trained as a harpist, she studied voice at the Collège Lamartine and the Conservatoire National Supérieur de Musique du Paris. She is best known for her roles in Baroque opera, having worked with William Christie at the Festival international d'Art Lyrique at Aix-en-Provence. She was named a Chevalier de l'Ordre des Arts et des Lettres in 2006 by the French government.