K3 may refer to:

Transportation

K-3 (Kansas highway) K-3 is a state highway in southeastern Kansas that runs through Crawford, Bourbon and Linn counties from K-47 near Girard to K-31 near Blue Mound. It was designated around 1932, and the entire route was paved by 1958. The road is maintained b ...

, a state highway in Kansas * London Bus route K3 * Taquan Air, an Alaskan commuter airline (by IATA code) * K-3 cart *

Kia Forte The Kia Forte, known as the K3 in South Korea, the Forte K3 or Shuma in China and Cerato in South America, Australia, New Zealand and Russia, is a compact car manufactured by South Korean automaker Kia since mid-2008, replacing the Kia Spectra. ...

, sold as Kia K3 in South Korea * LNER Class K3, a steam locomotive * GSWRI Class K3, a Great Southern and Western Railway (Ireland) steam locomotive

Military

;Units * Life Regiment Hussars, Swedish cavalry regiment ;Weapons *

K-3 (rifle) The K-3 is an Armenian bullpup assault rifle chambered for 5.45×39mm ammunition with a selective fire system, selecting between semi-automatic mode, burst mode, and full automatic fire mode. Little is known about the production and varia ...

, 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 ;Airfields * Pohang Airport, by United States Air Force designator during the Korean War

Science, technology, computing and mathematics

* The

Kleene logic In logic, a three-valued logic (also trinary logic, trivalent, ternary, or trilean, sometimes abbreviated 3VL) is any of several many-valued logic systems in which there are three truth values indicating ''true'', ''false'' and some indeterminate ...

K₃ * A version of the K (programming language) * K3 surface, a compact complex surface in mathematics * Menadione, vitamin K₃ * 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, 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 Kankakee is a city in and the county seat of Kankakee County, Illinois, United States. As of 2020, the city's population was 24,052. Kankakee is a principal city of the Kankakee-Bourbonnais-Bradley Metropolitan Statistical Area. It serves a ...

, an expression or abbreviation used to identify Kankakee, IL {{Letter-Number Combination Disambiguation