Joan (c. 1205 – 17 January 1271) was the Countess of Chiny and last descendant of the male line of the Carolingian dynasty. Joan was the daughter of Louis IV, Count of Chiny, and Matilda of Avesnes, and became ruler of the county upon her father’s death on 7October 1226. She married Arnold IV, Count of Loon, son of Gerard III, Count of Rieneck, and Kunigunde von Zimmern, in 1228, whereupon he assumed the role of Count of Chiny.