Marc Duval or Du Val (c. 1530 - 13 September 1581) was a French court painter and printmaker, most notable for his portraits of leaders of the Huguenot faction and as the probable painter of works previously attributed to the "Master of the Portrait of Sébastien de Luxembourg, Viscount of Martigues". For a time he was considered one of France's best draughtsmen and engravers. He worked at the court of the last kings of the Valois dynasty and produced highly-valued portraits of them and other nobility in Paris, dying in that city on 13 September 1581, a date he had himself predicted. He was married to Catherine, though her maiden name is unknown, and their daughter remained in Paris and was a talented artist.