Louis III may refer to:

• Louis the Younger, sometimes III of Germany (835–882)
• Louis III of France (865–882)
• Louis the Blind, Louis III, Holy Roman Emperor, (c. 880–928)
• Louis the Child, sometimes III of Germany (893–911)
• Louis III, Count of Chiny (died 1189)
• Ludwig III of Thuringia (ruled 1172–1190), see Hermann I, Landgrave of Thuringia
• Louis III of Châtillon (died 1391)
• Louis III of Naples (1403–1434)
• Louis III, Elector Palatine (ruled 1410–1436)
• Louis III, Landgrave of Hesse, nicknamed "the Frank" (1438–1471)
• Louis III, Count of Löwenstein (1530–1611)
• Louis III, Duke of Württemberg (1554–1593)
• 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)

Topics referred to by the same term

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