BLE is a three letter acronym that could mean:
- Bessemer and Lake Erie Railroad
- Bluetooth low energy, a wireless series of protocols for exchanging data over short distances, requiring less energy than the standard Bluetooth.
- Brotherhood of Locomotive Engineers, a railway labor union in the United States
- The ICAO airline code for Blue Line
- The IATA airport code for Borlänge Airport
- Bramley (West Yorkshire) railway station, a railway station in Bramley, a district in west Leeds, West Yorkshire, England. (National Rail code: BLE)