Wikipedia
PLK
PLK may refer to:
- PKP PLK, a Polish railroad company
- PLK Vicwood KT Chong Sixth Form College
- Polska Liga Koszykówki, Polish Basketball League
- Pulkovo Airlines, ICAO airline designator
- M. Graham Clark Downtown Airport, Missouri, USA, IATA code
- Polo-like kinase, regulators of the cell cycle (mitosis)