Joanna of Aragon (October 1375 - September 1407) was the only surviving child of John I of Aragon and his first wife Martha of Armagnac. She was a member of the House of Aragon and was Countess of Foix by her marriage to Matthew of Foix. Joanna was born at Daroca, the second of five children born into her father's first marriage. With his second wife, Violant of Bar, John had only one daughter who lived to adulthood, Yolande. Joanna, who failed to become Queen of Aragon, died childless in Valencia on September 1407. After Martin's death Yolande tried again to claim Aragon but failed.