Baldwin of Flanders usually refers to Baldwin I of Constantinople (1172–1205), Count of Flanders (as Baldwin IX) and the first Latin Emperor of Constantinople. It can also refer to:

• Baldwin I, Count of Flanders (died 879)
• Baldwin II, Count of Flanders (c. 865–918)
• Baldwin III, Count of Flanders (c. 940–962)
• Baldwin IV, Count of Flanders (c. 980–1035)
• Baldwin V, Count of Flanders (1012–1067)
• Baldwin VI, Count of Flanders (c. 1030–1070)
• Baldwin VII, Count of Flanders (1093–1119)
• Baldwin VIII, Count of Flanders (1150–1195), better known as Baldwin V, Count of Hainaut

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