RF is an abbreviation for radio frequency.

Rf or RF may also mean:

Arts and entertainment

• Red Faction (series), a series of revolution video games
• Rinforzando, rf, in music notation
• RF Online, an online RPG made by CCR

Business

• Aero K, IATA code (2020—present)
• Florida West International Airways, IATA code (1984—2017)
• Regions Financial Corporation, NYSE stock symbol
• Registered association (Finland) (Registrerad förening), Finnish legal status for a non-profit organization
• Royalty-free, in business

Government and politics

• France (République française)
• Russian Federation
• Rhodesian Front, former political party in Rhodesia

Biology and medicine

• Rheumatic fever, an inflammatory disease
• Release factors RF1, RF2, RF3, proteins
• Reticular formation, in the brainstem
• Rheumatoid factor, an antibody
• Receptive field, the response characteristic of a neuron
• Respiratory failure
• Risk factor

Other uses in science and technology

• Representative fraction
• Retardation factor in a chromatographic system
• Radiative forcing, the change in energy flux in the atmosphere caused by climate change factors
• Random forest, an ensemble learning method in data science
• Rutherfordium, symbol Rf, a chemical element
• Canon RF mount, interchangeable camera lens mount

Sports

• Range Factor, a baseball statistic
• Right fielder, a defensive position in baseball
• Roger Federer, a Swiss tennis player
• Swedish Sports Confederation (Swedish: Riksidrottsförbundet, RF), the umbrella organisation for Swedish sports