Joanna of Châtillon or Joan, French: Jeanne; (c. 1285 – 16 January 1354) was the wife of Walter V of Brienne (1305).
The marriage produced two children: On 15 March 1311, Joanna's husband Walter was killed in the Battle of Halmyros against the Catalan Company.
In April 1318, Joanna and her father sent a request to the Republic of Venice seeking money and ships for knights and infantry to Negroponte or Nauplia.
In January 1321, Philip V of France mediated the suit brought against her by her own son, who was suing for the payment of some of his father's great debt.
Her tomb, in the church (now destroyed) of the Dominican monastery in Troyes had the inscription Duchesse d'Athènes.