Eleanor or Leonor of Portugal is the name of:
Eleanor of Portugal, Queen of Denmark (1211–1231), daughter of Afonso II of Portugal and wife of Valdemar, co-King of Denmark Eleanor of Portugal, Queen of Aragon (1328–1348), daughter of Afonso IV of Portugal and wife of King Peter IV of Aragon Eleanor of Portugal, Holy Roman Empress (1434–1467), daughter of Edward I of Portugal and wife of Frederick III, Holy Roman Emperor Eleanor of Viseu, Queen of Portugal (1458–1525), aka Eleanor of Lancaster, wife of King John II of Portugal Eleanor of Austria, Queen of Portugal (1498–1558), wife of King Manuel I of Portugal