Louis III

Louis III may refer to:

* Louis III of France (865–882).
* Louis the Younger, sometimes III of Germany (835–882).
* Louis the Child, sometimes III of Germany (893–911).
* Louis III, Holy Roman Emperor, "the Blind" (c. 880–928).
* Ludwig III of Thuringia (ruled 1172–1190).
* Louis III of Châtillon (died 1391).
* Louis III of Naples (1403–1434).
* Louis III, Elector Palatine (ruled 1410–1436).
* Louis III, Landgrave of Hesse, "the Frank" (1438–1471).
* Louis III, Cardinal of Guise (1575–1621).
* Louis III, Prince of Condé (1668–1710).
* Ludwig III, Grand Duke of Hesse and by Rhine (1806–1877).
* Ludwig III of Bavaria (1845–1921).