Poppo can mean:

• Bubo, Duke of the Frisians, also spelled Poppo (674–734), a king of Friesland
• Poppo of Grapfeld (died 839/41), an early ninth-century ancestor of the Babenbergs
• Poppo, Duke of Thuringia (died after 906), a margrave
• Poppo I, Bishop of Würzburg (941–961)
• Poppo II, Bishop of Würzburg (961–983)
• Poppo (bishop of Kraków) (died 1008?)
• Poppo of Treffen, Patriarch of Aquileia from 1019 to 1045
• Poppo (archbishop of Trier) (986–1047)
• Pope Damasus II (died 1048), whose birthname was Poppo
• Poppo of Stavelot (Saint Poppo of Deinze, 977–1048), an abbot
• Poppo von Paderborn [de] (died 1083), Bishop of Paderborn from 1076
• Poppo II, Margrave of Carniola and Istria (died 1098)
• Poppo I of Blankenburg (ca. 1095–1161 or 1164), Count of Blankenburg
• Poppo von Osterna (died 1257), a Grandmaster of the Teutonic Knights
• Poppo III von Trimberg, Bishop of Würzburg (1267–1271)
• Ernst Friedrich Poppo (1794–1866), a German scholar
• Ronald Edward Poppo (born 1947), American victim of the 2012 Miami cannibal attack

• Pidgey, the English name for Poppo in the Pokémon series
• All pages with titles containing Poppo