CFS is an acronym for:
- Call for service
- Canada Flight Supplement
- Canadian Federation of Students
- Canadian Forces Station
- Canadian Forest Service
- Carrier Frequency Shift, a term used by the British Military to refer to RTTY
- Center for Financial Studies, a research institute affiliated with Goethe University Frankfurt
- Central Flying School
- Safety training certificate (France) (Flight attendant), Certificat de formation à la sécurité, the French national degree required to be flight attendant in France
- Charlottesville Fashion Square, an enclosed shopping mall in the Charlottesville, Virginia area
- Chemins de Fer Syriens, the Syrian state railway system
- Chicken fried steak, food
- Child and family services
- Chromosomal fragile site, a part of the chromosome prone to breakage.
- Chronic fatigue syndrome, medical disorder
- Citizens for Sunshine, an Ohio nonprofit promoting access to public records
- Cold formed steel, a goods manufacturing technique
- Combat Flight Simulator WWII Europe Series (CFS1)
- CFS (Compact File Set file format), an open file format for archiving and compressing files.
- Committee on World Food Security
- Completely Fair Scheduler, a Linux operating system scheduler
- Congo Free State, a recognized national entity in central Africa 1885–1908
- Conservative Future Scotland, the youth branch of the Scottish Conservative Party
- Continuous Flow System, printer ink feeding via tubes and bottles
- Co-operative Financial Services Ltd.
- Country Fire Service
- Corpo Forestale dello Stato, the Italian state forestry department
- Craigmillar Festival Society, a disestablished community organisation from Edinburgh, Scotland
- Cryptographic File System, file based crypto published by Matt Blaze in 1993
- Cubic feet per second, a unit of fluid flow rate
CFS may also refer to:
- Coffs Harbour Airport, IATA airport code