BEF can mean:
- British Equestrian Federation
- British Expeditionary Force (World War I)
- British Expeditionary Force (World War II)
- Brazilian Expeditionary Force
- BEF (image format), High Dynamic Range imaging format
- B.E.F. (British Electric Foundation)
- Bonus Expeditionary Force
- Belgian franc, ISO 4217 currency code for the former currency of Belgium
- Bluefields Airport (IATA Code: BEF) in Bluefields, Nicaragua
- Bonneville Environmental Foundation
- Bibliothèque des Ecoles françaises d'Athènes et de Rome
- Brightness Enhancement Film