COR may refer to:
- Change Order Request
- California State Prison, Corcoran, in the USA
- IATA airport code for Ingeniero Aeronáutico Ambrosio L.V. Taravella International Airport, servicing Córdoba, Argentina
- Central Outdoor Router
- Certificate of Registration, the legal document that proves an aircraft is legally registered to fly and indicates to whom the aircraft is registered
- Cervico-Ocular Reflex
- Church of the Redeemer (disambiguation)
- Church of the Resurrection (disambiguation)
- Coefficient of restitution
- College of Radiographers
- Committee of the Regions
- Commonwealth Oil Refineries
- Confederation of Regions
- Contracting Officer's Representative -- See Government contract or COTR
- COR (label) - label for Kashruth Council of Canada
- COR (Canadian workers' compensation) - Certificate of Recognition granted by several Canadian workers' compensation authorities
- Córdoba, Argentina (airport code)
- Council of Representatives
- Cup of Russia
- the station code for Corby railway station
- shorthand for Coronatine, a bacterial effector.