Henry IV may refer to:
- Henry IV, Holy Roman Emperor (1050–1106), King of The Romans and Holy Roman Emperor
- Henry IV, Duke of Limburg (1195–1247)
- Henry IV, Duke of Brabant (1251/1252–1272)
- Henryk IV Probus (c. 1258–1290), Duke of Wrocław
- Heinrich IV Dusemer von Arfberg (d. 1353), 21st Grand Master of the Teutonic Knights
- Henry IV of England (1367–1413), King of England and Lord of Ireland
- Henry IV, Duke of Mecklenburg (1417–1477)
- Henry IV of Castile (1425–1474), King of Castile, nicknamed the Impotent
- Henry IV of Neuhaus (1442–1507)
- Henry IV, Duke of Brunswick-Lüneburg (1463–1514), Prince of Wolfenbüttel, nicknamed Henry the Elder or Henry the Evil
- Henry IV, Duke of Saxony (1473–1541)
- Henry IV of France (1553–1610), King of France and Navarre
- Heinrich IV, Prince Reuss of Köstritz (1919-2012), former head of the German Princely House of Reuss
- Plays
- Henry IV, Part 1, by William Shakespeare, referring to Henry IV of England
- Henry IV, Part 2, by William Shakespeare, referring to Henry IV of England
- Henry IV (Pirandello), by Luigi Pirandello, referring to Henry IV, Holy Roman Emperor.
- Films
- Henry IV (film), a 1959 BBC Television drama film based on the Luigi Pirandello play
- Henry IV (film), a 1984 Italian film based on the Luigi Pirandello play
- Other
- French battleship Henri IV, named after Henri IV of France
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