PLK
PLK stands for:
- Point Lookout (MO, USA) in IATA code
- Polska Liga Koszykówki ( pl. ), see Polish basketball league
- Polskie line JSC, Polish railway infrastructure company
- Postlager card, a term from the postal service
- PLK1 protein kinase, an enzyme
- Psychiatric State Hospital, Old name of the Psychiatric Centre North Baden (PZN ) in Wiesloch
- Pulkovo Airlines, Airline ICAO code
- Disambiguation
- Abbreviation