查理一世（法语：Charles I le Grand、Charlemagne，德语：Karl I der Große，拉丁语：Carolus Magnus，（742年4月2日－814年1月28日）或根据英文翻译作查理曼，查理大帝，卡尔大帝。法兰克王国加洛林王朝国王（768年—814年），800年由教皇良三世加冕于罗马，成为他所扩张地区的皇帝，后人称他查理曼。「查理曼大帝」为一个错误翻译法，magne本身已含有「大帝」的意思。查理曼还是国际上最流行的法国式扑克牌上的红心K人物。

Charlemagne (/ˈʃɑːrlᵻmeɪn/; 2 April 742/747/748 –28 January 814), also known as Charles the Great (Latin:Carolus or Karolus Magnus) or Charles I (Frankish: *Karl), was King of the Franks. He united most of Western Europe during the early Middle Ages and laid the foundations for modern France and Germany. He took the Frankish throne in 768 and became King of Italy from 774. From 800, he became the first Holy Roman Emperor — the first recognized emperor in Western Europe since the fall of the Western Roman Empire three centuries earlier. Charlemagne already ruled his kingdom without the help of the Pope, but recognition from the pontiff granted him divine legitimacy in the eyes of his contemporaries.