Louis IV or Ludwig IV may refer to:
- Louis the Child, known also as Louis IV (893–911)
- Louis IV of France (920–954)
- Ludwig IV, Landgrave of Thuringia (1200–1227)
- Louis IV, Holy Roman Emperor (1282–1347)
- Louis IV, Elector Palatine (1424–1449)
- Louis IV, Prince of Condé and Duke of Bourbon (1692–1740)
- Ludwig IV, Grand Duke of Hesse and by Rhine (1837–1892)
Famous quotes containing the word louis:
“my lazy little shadow, like an arrant sleepy-head,
Had stayed at home behind me and was fast asleep in bed.”
—Robert Louis Stevenson (1850–1894)