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
• Henry IV, Count of Bar (1315/20–1344)
• Heinrich IV Dusemer von Arfberg (died 1353), 21st Grand Master of the Teutonic Knights
• Henry IV, Prince of Anhalt-Bernburg (died 1374)
• Henry IV of England (1367–1413), King of England and Lord of Ireland
• Henry IV, Count of Holstein-Rendsburg (1397–1427)
• 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, Burgrave of Plauen (1510–1554)
• Henry IV of Sayn (1539–1606), cathedral dean and Count of Sayn
• 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

• 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

• Henry IV (1959 film), a 1959 BBC Television drama film starring Martin Miller, based on the play by Luigi Pirandello
• Henry IV (film), a 1984 Italian film based on the Luigi Pirandello play
• Henri 4 (film), a 2010 film directed by Jo Baier.
• BBC Television Shakespeare Season Two - The First Part of King Henry the Fourth (1979)
• BBC Television Shakespeare Season Two - The Second Part of King Henry the Fourth (1979)

• French battleship Henri IV, named after Henri IV of France

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