Joanna of Aragon (7 November 1344, Barcelona - 1385, Castelló d'Empúries) was a Catalan noblewoman, the second child of Peter IV of Aragon and his first wife Maria of Navarre.
She was an Infanta of Aragon by birth and Countess of Empúries by her marriage.
Joanna was 29 at the time of the marriage, she was considered an older bride.
Many members of her family showed dislike to her father's fourth wife Queen Sibila, due to her low ranking birth and her family's interference at court.
[citation needed] The marriage of Peter and Sibila also led to a strain between himself and his three surviving children: Joanna, John and Martin.