ABR may refer to:
Technology:
- Available Bit Rate, a service used in ATM networks
- Average bitrate, the average amount of data transferred per second
- Area border router, in the Open Shortest Path First protocol
Transport:
- Abercynon North railway station, a closed railway station formerly serving the village of Abercynon in the Cynon Valley, South Wales
- IATA airport code for Aberdeen Regional Airport, an airport east of Aberdeen, South Dakota, United States
- ABR, the ICAO airline designator for Air Contractors, a European freight airline
- Athens Line, a railroad operating in the U.S. state of Georgia
Other uses:
- American Board of Radiology
- Auditory brainstem response, an electrical signal evoked from the brainstem of a human or other mammal by the presentation of a sound
- August Burns Red, a metalcore band from Lancaster, Pennsylvania
- Australian Book Review, a literary magazine