The name Charles I may refer to:

• Kings:
  • Charlemagne, Charles I, Holy Roman Emperor (742-814)
  • Charles I of England, Scotland, and Ireland (1600-1649) "King and martyr"
  • Charles I of Spain (also known as Charles V, Holy Roman Emperor, Holy Roman Emperor) (1500-1558)
  • Charles I of Romania (1839-1914)
  • Charles I of Sicily (1226-1285)
  • Charles I of Portugal (1863-1908)
  • Charles I of Hungary (1288-1342)
• Other:
  • Charles, Duke of Lower Lotharingia (953–993)
  • Charles I, Count of Flanders (1080/86–1127), called Charles the Good
  • Charles I, Duke of Bourbon (1401-1456)
  • Charles II, Duke of Lorraine, sometimes called Charle I of Lorraine (1364-1431)
  • Karl of Austria, Charles I of Austria, (also known as Charles IV of Hungary) (1887-1922)

This disambiguation page lists articles associated with the same personal name. If an article link led you here, you may wish to change the link to point directly to the intended article.