• Sri Lanka
• .lk, the Internet country code top-level domain (ccTLD) for Sri Lanka.
• The IATA code for Air Luxor airline

LK may also refer to:

• low kick
• Lech Kaczyński - President of Poland since 2005
• The Latin Kings - An urban street gang.
• A particular Sequent calculus
• Lanky Kong, a Donkey Kong first seen in Donkey Kong Country