James I may refer to:
People[edit]
- James I of Aragon (1208–1276)
- James I of Sicily or James II of Aragon (1267–1327)
- James I, Count of La Marche (1319–1362), Count of Ponthieu
- James I, Count of Urgell (1321–1347)
- James I of Cyprus (1334–1398), also titular king of Armenia and Jerusalem
- James I of Scotland (1394–1437)
- James VI and I (1566–1625), King of Scotland and also King of England and Ireland
- James Harden-Hickey or James I (1893–1895), self-declared Prince James I of Trinidad
Other uses[edit]
- James 1, the first chapter of the Epistle of James
- James I Land, Spitsbergen, Svalbard