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
This disambiguation page lists articles about people with the same name.
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