Alexander I may refer to: Alexander I of Macedon, king of Macedon from 495–454 BC Alexander I of Epirus (370–331 BC), king of Epirus Pope Alexander I (died 115), early bishop of Rome Pope Alexander I of Alexandria (died 320s), patriarch of Alexandria Alexander I of Scotland ( – 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 See also King Alexander (disambiguation)