William Bergen may refer to:

• William M. Bergen (1862–1934), American politician
• Bill Bergen (1878–1943), baseball player

• Bilen (disambiguation)
• Bilene Airport
• Bilene Macia
• Bilenky Cycle Works
• Bilenska Kolonia
• Bile Podoli
• Bile Policany
• Bile River
• Bilerp
• Biles
• Bile salt dependent lipase
• Bile-salts
• Bile salt-stimulated lipase
• Bile salt sulfotransferase
• Bileser
• Bile-stone
• Bilesuvar
• Bilesuvar (village)
• Biletan
• Bile Them Cabbage Down
• Biletici
• Biletići
• Bilev
• Bilevel car
• Bilevel optimization