LCK
LCK stands for:
- League of Legends Champions Korea , a South Korean esports league
- Lock , English for "lock", concept of computer science; also file extension for lock files from Borland Paradox
- Lübben-Cottbusser Kreisbahnen , locomotive series; see LCK No. 1 to 7
- Rickenbacker International Airport in the United States of America (IATA code)