Alexander I

Alexander I may refer to:

• Alexander I of Macedon, king of Macedon from 495 to 454 BC
• Alexander I of Epirus (370–331 BC), king of Epirus
• Alexander I Theopator Euergetes, surnamed Balas, ruler of the Seleucid Empire 150-145 BC
• Pope Alexander I (died 115), early bishop of Rome
• Pope Alexander I of Alexandria (died 320s), patriarch of Alexandria
• Alexander I of Scotland ({{Circa|1078}} – 1124), king of Scotland
• Aleksandr Mikhailovich of Tver (1301–1339), prince of Tver as Alexander I
• Alexander I of Georgia (1386–?), king of Georgia
• Alexander I of Moldavia (died 1432), prince of Moldavia
• Alexander I of Kakheti (1445–1511), king of Kakheti
• Alexander Jagiellon (1461–1506), king of Poland
• Alexander I of Russia (1777–1825), emperor of Russia
• Alexander of Battenberg (1857–1893), prince of Bulgaria
• Alexander I of Serbia (1876–1903), king of Serbia
• Alexander I of Yugoslavia (1888–1934), king of Yugoslavia
• Alexander of Greece (1893–1920), king of Greece