Joan of Portugal (disambiguation)

Joan of Portugal, or Joanna, may refer to:
 * Joan of Portugal (1439–1475), repudiated consort of Henry IV of Castile
 * Joanna, Princess of Portugal (1452–1490), beatified nun
 * Joanna of Austria, Princess of Portugal, 1535-1572, sister of Philip II of Spain, married to João Manuel, Prince of Portugal.
 * Joana, Princess of Beira (1635–1653), daughter of John IV of Portugal