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 K3 The complete graph on three vertices 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 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)