Baldwin I may refer to:
- Baldwin I of Flanders (died 879)
- Baldwin I, Count of Hainaut and shortly Count of Flanders (c. 1030 – 1070)
- Baldwin I of Jerusalem (c.1060 – 1118)
- Baldwin I of Ramla (died 1138)
- Baldwin I of Constantinople (1172–1205)
See alsoEdit
- Baudouin I, King of the Belgians (1930–1993)