BEU is a three-letter acronym that may stand for:
- British Empire Union, a historical union formed in the United Kingdom during World War I to support British goods
- Bank Employees' Union (disambiguation), any of several trade unions
- Biker Enforcement Unit, a division of the Ontario Provincial Police's organized crime section
- Bedourie Airport, with IATA code BEU
- Bundesstelle für Eisenbahnunfalluntersuchung or Federal Authority for Railway Accident Investigation, German agency investigating railway accidents.
