3K

3K or 3-K may refer to:


 * 3Kingdoms, a MUD, or text-based online role-playing game
 * IATA airline designator for Jetstar Asia
 * Ku Klux Klan
 * 3K (Treći kanal RTS-a), a former channel of Radio Television of Serbia.
 * 3K digital film resolutions, see List of common resolutions.
 * Kinder, Küche, Kirche
 * Kitanai, kiken, and kitsui (Dirty, Dangerous and Demeaning), a class of jobs
 * 3000 (number)
 * 3K, a Toyota K engine
 * 3K Battery
 * SSH 3K (WA), see Washington State Route 128
 * 3K radiation, see Cosmic microwave background radiation
 * PI-3K, see Phosphoinositide 3-kinase
 * Python 3K, see Python (programming language)
 * F6F-3K Hellcat, a model of Grumman F6F Hellcat
 * Mystery Science Theater 3K, see Mystery Science Theater 3000
 * 3k, track and field shorthand for 3000 metres
 * EIF3K gene
 * Jetstar Asia's IATA designator.