BCN can mean:
- Baja California (informal three code abbreviation)
- Banque Cantonale Neuchâteloise
- Barcelona (BCN is often used as an abbreviation)
- Barcelona El Prat Airport (IATA airport code)
- BCN Competicion, a Spanish motor-racing team
- Bi Community News
- Birmingham Canal Navigations
- Board Certified in Neurofeedback, a certification administered by the Biofeedback Certification Institute of America
- Boron Carbonitride, another name for Heterodiamond, a superhard material
- British Commonwealth of Nations
- Broadcasting Corporation of Newfoundland
- Broadcasting Corporation of Niue
- Büro Center Nibelungenplatz, a skyscraper in Frankfurt am Main, Germany
- Rinker School of Building Construction
- 1 inch type B videotape BCN series 1 inch type B videotape (1979-1989)