RF is an abbreviation for radio frequency.

Rf or RF may also refer to:

Arts and entertainment

• Red Faction (series), a series of revolution video games

• Rinforzando, , in music notation

• RF Online, an online RPG made by CCR

• RFTV, a Brazilian television network

• Radio Nippon, (a.k.a. RF Radio Nippon, from its call sign JORF), a radio station in Yokohama, Japan

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

• Rest frame

• 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

• Rangefinder camera, a camera using a range-finding focusing mechanism

Sports

• Range Factor, a baseball statistic

• Right fielder, a defensive position in baseball

• Roger Federer, a Swiss tennis player

• Swedish Sports Confederation (, RF), the umbrella organisation for Swedish sports