BDF or Bdf may refer to:
Businesses and organisations
- Ballroom Dancers' Federation, a British organization for competitive ballroom dancers
- Banca Dacia Felix (Dacia Felix Bank), a defunct Romanian bank
- Beiersdorf AG, a multinational corporation based in Hamburg, Germany
- Banque de France (Bank of France), the French central bank
Events
- Bates Dance Festival, a yearly dance festival held at Bates College, Maine, US
- Berlin Demography Forum, an annual conference
Mathematics and units
- Backward differentiation formula, a numerical method for solving ordinary differential equations
- Board foot, unit of measure for volume of lumber
People
- Bassirou Diomaye Faye (born 1980), president of Senegal
Places
- Bedfordshire, a historic county in England, Chapman code
- Bois-des-Filion, Quebec, a town in Quebec, Canada
Technology
- Building Distribution Frame, a type of distribution frame in telecommunications
- PCI BDF (bus/device/function), a range of configurable addresses in PCI configuration space
- Glyph Bitmap Distribution Format, a file format for storing bitmap fonts
- Bromo-DragonFLY, a psychedelic drug
Military
- Bangladesh Forces, the combined forces of Bangladesh during its war of independence in 1971
- Bahrain Defense Force, the military of Bahrain
- Barbados Defence Force, the military of Barbados
- Belize Defence Force, the military of Belize
- Botswana Defence Force, the military of Botswana