Susanna Mary Avery-Quash (born 1970) is a British art historian, curator, and author. She is senior research curator at the National Gallery, researching its collections and curating 19th-century items in its history collection, and a research fellow in the history of art at the University of Buckingham. She has written widely on her subject, with particular interests in early Italian art and the growth of the international art market, and is a contributor to the Oxford Dictionary of National Biography.