Others
- The IATA Airline Designator for Air Astana, Kazakhstan's national airline
- KC HiLiTES, manufacturer of the KC Daylighter driving lights
- The Kennel Club, a dog-breed registry in England
- Kid Cuisine, a U.S. brand of frozen dinners
- King's Counsel (with postnominal KC), a legal position in the UK and Commonwealth countries
- Kingston Communications, now KCOM Group, UK communications and IT service provider
- KC, previous name for the cytokine CXCL1
- King Crimson, English progressive rock band
Kc may refer to:
- Kc, the equilibrium constant, an expression of the equilibrium of a chemical reaction
- kc or kc/s, Kilocycles per second (thousands of cycles per second), an obsolete term for kilohertz
- Kc, fracture toughness in engineering materials
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