FDU may refer to:

• Bandundu Airport, in the Democratic Republic of the Congo
• Fairleigh Dickinson University, in New Jersey, United States
• FDU materials, a class of structured mesoporous polymers
• Firemen and Deckhands' Union of New South Wales, an Australian trade union
• Fudan University, in Shanghai, China
• Führer der Unterseeboote, a naval office of the German Empire during World War I
• United Democratic Forces (Benin) (French: {{lang|fr|Forces Démocratiques Unies}}), a political alliance in Benin
• United Democratic Forces of Rwanda (French: {{lang|fr|Forces Democratiques Unifiées}}), a political alliance in Rwanda

• Arthur Fowler and Pauline Fowler
• Arthur Fox-Davies
• Arthur Fox Sr.
• Arthur Foxton Ferguson
• Arthur Francis Basset Hull
• Arthur Francis Buddington
• Arthur Francis Eric Palliser
• Arthur Francis (footballer)
• Arthur Francis (Glamorgan cricketer)
• Arthur Francis Kelly Block
• Arthur Francis (politician)
• Arthur Francis (rugby)
• Arthur Frankau
• Arthur Frank Burns
• Arthur Franke
• Arthur Frank Holmes
• Arthur Franklin
• Arthur Frederic Clarke
• Arthur Frederick Goodrich
• Arthur Frederick Hurst
• Arthur frederick jones
• Arthur Frederick Jones
• Arthur Frederick Rykert
• Arthur Frederick Ward
• Arthur Frederick Watts