LCK may refer to:

• Tyrosin-protein kinase Lck

Transport stations and areas

• Rickenbacker International Airport, Columbus, Ohio (IATA airport code LCK)

• Lockwood railway station, England (National Rail station code LCK)

• Lai Chi Kok station, Hong Kong (MTR station code LCK)

• Lim Chu Kang, Singapore

Gaming

• League of Legends Champions Korea, the top-level league for League of Legends competition in South Korea

• A shortened form of the word "Luck" used in many Role-playing games

Other

• Louis C.K., stand-up comedian, writer, producer, director, and actor

• Language Construction Kit, a feature of the website Zompist.com