LK or lk may refer to:
Businesses and organizations
- Air Luxor, IATA airline code
- Marking of Latin Kings (gang)
- Luckin Coffee, Chinese coffee house chain (former NASDAQ ticker lk)
Science and technology
- System LK, in mathematics, the classical sequent calculus
- LK (spacecraft), a Soviet lunar lander
Other uses
- LK (index mark code), county Limerick, Ireland, vehicle registration
- LK I, a German light tank prototype of the World War I
- LK II, a German light tank of World War I
- LK-700, a Soviet direct ascent lunar lander program proposed in 1964
- The LK, a Swedish indie band
- Sri Lanka (ISO 3166-1 alpha-2 country code LK)
- .lk, Internet top-level domain for Sri Lanka
- En-LK, Sri Lankan English
- LK (Carolina Carol Bela), a drum and bass song by DJ Marky, XRS, and Stamina MC
See also
- KL (disambiguation)
- IK (disambiguation)
- 1K (disambiguation)
- L (disambiguation)
- K (disambiguation)