FDU may refer to:
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Bandundu Airport, in the Democratic Republic of the Congo
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Fairleigh Dickinson University, in New Jersey, United States
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FDU materials, a class of structured mesoporous polymers
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Firemen and Deckhands' Union of New South Wales, an Australian trade union
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Fudan University, in Shanghai, China
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Führer der Unterseeboote
The post of ''Führer der Unterseeboote (FdU)'' ("Leader of the U-boats") was the senior commanding officer of U-boat forces in a theatre of war. The submarine service in the Kaiserliche Marine of World War I and the Kriegsmarine of World War II, ...
, a naval office of the German Empire during World War I
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United Democratic Forces (Benin) (French: '), a political alliance in Benin
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United Democratic Forces of Rwanda (French: '), a political alliance in Rwanda
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