Kansas City, Missouri (the larger of the cities of this name)

The Kansas City Chiefs, a National Football League team

Keratoconus, a disorder of the cornea

King Crimson, an English progressive rock band

Knights of Columbus

The Kansas City Metropolitan Area, including

Kelly Clarkson, American pop singer

The Kansas City Royals, a Major League Baseball team

Kansas City, Kansas

K_c, the chemistry equilibrium constant

King's Counsel (with postnominal KC), a legal position in the United Kingdom, currently in disuse in favor of Queen's Counsel

The KC Stadium, a Football and Rugby League stadium in the city of Kingston upon Hull sponsored by the above

Kristin Chenoweth, an American entertainer

Kimberly-Clark Corporation (NYSE: KMB, BMV: Kimber) is an American corporation that produces mostly paper-based consumer products. Kimberly-Clark brand name products include "Kleenex" facial tissue, "Kotex" feminine hygiene products, "Cottonelle"...

KC and the Sunshine Band, an American funk, R&B and disco musical group

Kilocycles, (thousands of cycles per second), an obsolete term for kilohertz

Kim Chiu, Philippine actress

Kingston Communications, a telecommunications provider based in Kingston upon Hull, UK

Harry Wayne Casey, the leader of K.C. and the Sunshine Band, who usually credits his name as KC

Kellogg College, University of Oxford.

A phonetic spelling for Casey

The Kennel Club, a dog-breed registry

KC Concepcion, Philippine commercial model

KC HiLiTES, manufacturer of the KC Daylighter driving lights

KC, a fictional character from The Tribe. He was played by Ari Boyland.

Kaiser Chiefs, British band named after the South African football team

Kaizer Chiefs FC, a South African football team

The IATA Airline Designator for Air Astana, Kazakhstan's national airline.