Baldwin II may refer to:
- Baldwin II of Flanders ( 865–918)
- Baldwin II of Boulogne ( 990– 1033)
- Baldwin II, Count of Hainaut (1056–1098)
- Baldwin II of Jerusalem, King of Jerusalem (died 1131)
- Baldwin II of Constantinople, Latin Emperor of Constantinople (1217–1273)
de:Liste der Herrscher namens Balduin#Balduin II.