K3 may refer to:

Transportation

  • China Railway K3/4
  • K-3 (Kansas highway), a state highway in Kansas
  • London Bus route K3
  • Taquan Air, an Alaskan commuter airline (by IATA code)
  • K-3 cart
  • Kia Forte, a compact car sold as Kia K3 in South Korea
  • Kia K3 (BL7), a subcompact car
  • LNER Class K3, a class of British steam locomotives
  • GSWRI Class K3, a Great Southern and Western Railway (Ireland) steam locomotive

Military

Weapons

  • K-3 (rifle), an Armenian-made bullpup rifle
  • Daewoo K3, a light machine gun

Ships

  • Soviet submarine K-3 Leninsky Komsomol, the first Soviet nuclear submarine
  • , a 1914 United States Navy K-class submarine
  • , a 1916 British K-class submarine
  • , a 1940 Royal Navy Flower-class corvette

Other

  • Pohang Airport, by United States Air Force designator during the Korean War
  • Life Regiment Hussars, Swedish cavalry regiment
  • K3, a bombproof WWII submarine pen at the German Lorient Submarine Base in France

Science, technology, computing and mathematics

  • The Kleene logic K<sub>3</sub>
  • The complete graph on three vertices <math>K_3</math>
  • A version of the K (programming language)
  • K3 surface, a compact complex surface in mathematics
  • Menadione, vitamin K<sub>3</sub>
  • K3, 1774 marine chronometer made by Larcum Kendall
  • Pentax K-3, a digital SLR camera

Media and entertainment

  • K3 (band), a Belgian/Dutch girl group
  • K3 (television), a Catalan television channel
  • K3: Prison of Hell, a 2009 pornographic horror film
  • K3 Film Festival, a film festival held annually in Villach, Austria, since 2007
  • K3, a world in Donkey Kong Country 3: Dixie Kong's Double Trouble!

Other uses

  • K3 League, a South Korean football league
  • Gasherbrum IV, a mountain in the Karakoram previously surveyed as K3. Sometimes erroneously recorded as Broad Peak.
  • Kankakee, Illinois, an expression or abbreviation used to identify Kankakee, IL

See also

  • KKK (disambiguation)
  • 3K (disambiguation)