John I may refer to:

People

Religious figures

  • John I (bishop of Jerusalem)
  • John Chrysostom (349 – c. 407), Patriarch of Constantinople
  • John I of Antioch (died 441)
  • Pope John I of Alexandria, Coptic Pope from 496 to 505
  • Pope John I, Pope from 523 to 526
  • John I (exarch) (died 615), Exarch of Ravenna
  • John I (archbishop of Trier) (c. 1140-1212), Archbishop of Trier from 1190 to 1212
  • Pope John Paul I, Pope in 1978

Counts

  • John I of Ponthieu (c. 1147 – 1191)
  • John I of Dreux (1215–1249)
  • John I of Avesnes (1218–1257), Count of Hainaut
  • John I, Count of Blois (died 1280)
  • John I of Brienne, Count of Eu (died 1294)
  • John I, Count of Holland (1284–1299)
  • John I Orsini (1303/4–1317), Count of Cephalonia
  • John I of Nassau-Weilburg (1309–1371)
  • John I, Count of La Marche (1344–1393)
  • John Günther I, Count of Schwarzburg-Sondershausen, (1532–1586)
  • John I, Count Palatine of Zweibrücken (1550–1604)

Dukes

  • John I of Naples (died c. 719)
  • John I of Amalfi (died 1007)
  • John of Brunswick, Duke of Lüneburg (c. 1242–1277)
  • John I, Duke of Saxony (1249–1285)
  • John I, Duke of Brittany (1217–1286)
  • John I, Duke of Brabant (1253–1294)
  • John I, Duke of Bavaria (1329–1340)
  • John I, Duke of Opava-Ratibor (c. 1322 – c. 1380–1382)
  • John I, Duke of Mecklenburg-Stargard (1326–1392/93)
  • John I, Duke of Lorraine (1346–1390)
  • John, Duke of Berry (1340–1416)
  • John the Fearless (1371-1419), ruler of the Burgundian State from 1404 to 1419
  • John I of Münsterberg (ca. 1380 – 1428)
  • John I, Duke of Bourbon (1381–1434)
  • John Albert I, Duke of Mecklenburg, (1525–1576)
  • John, 6th Duke of Braganza (1543–1583), a.k.a. John I, Duke of Braganza
  • John Ernest I, Duke of Saxe-Weimar (1594–1626)
  • Johann Adolf I, Duke of Saxe-Weissenfels (1649–1697)

Emperors

  • John I Tzimiskes (c. 925 – 976), Byzantine Emperor
  • John I of Trebizond (died 1238)
  • Yohannes I of Ethiopia (ruled 1667–1692)

Kings

  • John of Abkhazia (ruled 878/879–880)
  • John of England (1166–1216), King of England, Lord of Ireland, Duke of Normandy and Aquitaine and Count of Anjou
  • John I of Sweden (c. 1201 – 1222), king of Sweden
  • John of Brienne (c. 1148 – 1237), king of Jerusalem
  • John I of Cyprus (1259–1285)
  • John of Scotland (c. 1249 – c. 1313)
  • John I of France (1316), king for the five days he lived
  • John I of Bohemia (1296–1346)
  • John I of Castile (1358–1390)
  • John I of Aragon (1350–1396)
  • John I of Portugal (1357–1433), King of Portugal and of the Algarve, Lord of Ceuta
  • John I Albert of Poland, (1459–1501)
  • João I of Kongo, ruler of the Kingdom of Kongo between 1470 and 1509
  • John, King of Denmark called Hans of Denmark, (1455–1513), King of Denmark, Norway and Sweden<!-- John I of Denmark and John II of Sweden -->
  • János Szapolyai (1487–1540), King of Hungary and Slavonia
  • John of Saxony (1801–1873)

Princes

  • John I, Prince of Anhalt-Bernburg (d.&nbsp;1291)
  • Hans-Adam I, Prince of Liechtenstein (1662–1712)

Others

  • John I of Gaeta (died c. 933)
  • John I Doukas of Thessaly (1268–1289)
  • John I of Montferrat (c. 1275–1305), Marquis of Montferrat
  • John of Islay, Lord of the Isles (died 1386)
  • John I of Alençon (1385–1415)
  • John Frederick I, Elector of Saxony (1503–1554)

Biblical

  • John 1, the first chapter of the Gospel of John
  • First Epistle of John or 1 John

See also

  • Jean I (disambiguation)
  • Juan I (disambiguation)
  • Johann I (disambiguation)
  • John (disambiguation)
  • King John (disambiguation)