Peter IV may refer to:

• Pope Peter IV of Alexandria (ruled 565–569)
• Patriarch Peter IV of Alexandria (ruled 643–651)
• Peter IV of Ravenna (927–971)
• Peter IV of Bulgaria (ruled 1185–1197)
• Peter IV of Aragon (1319–1387)
• Peter IV of Portugal (I of Brazil) (1798–1834)
• Ignatius Peter IV, Syriac Orthodox Patriarch of Antioch in 1872–1894

• Pedro IV (disambiguation)

Topics referred to by the same term

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