Albert I may refer to:
People Born before 1300 Albert I, Count of Vermandois (917–987) Albert I, Count of Namur () Albert I of Moha Albert I of Brandenburg (), first margrave of Brandenburg Albert I, Margrave of Meissen (1158–1195) Albert I of Käfernburg (), Archbishop of Magdeburg Albert I of Pietengau () Albert I, Lord of Mecklenburg (after 1230–1265) Albert I, Duke of Brunswick-Lüneburg (1236–1279), second duke of Brunswick-Lüneburg Albert I of Germany (1255–1308), king of Germany and archduke of Austria Albert I, Prince of Anhalt-Zerbst (–1316)
Born after 1300 Albert I, Duke of Bavaria (1336–1404), duke of Bavaria-Straubing, count of Holland, Hainault and Zealand Albert I, Duke of Mecklenburg-Stargard Albert I, Duke of Brunswick-Grubenhagen () Albert I, Duke of Münsterberg-Oels (1468–1511) Albert I, Duke of Prussia (1490–1568), first Duke of Prussia Albert I, Prince of Monaco (1848–1922) Albert I of Belgium (1875–1934), king of the Belgians Albert I Kalonji Ditunga (1929–2015), Congolese politician
Other uses Albert I (monkey), the first mammal used in a subspace rocket launch, June 11, 1948
See also Albert (given name)