PDK may refer to:
- Christian Democratic Party of Albania (Albanian: Partia Demokristiane e Shqipërisë), a political party in Albania
- DeKalb-Peachtree Airport, Atlanta, Georgia
- Democratic Party of Kosovo (Albanian: Partia Demokratike e Kosovës), a political party in Kosovo
- Kurdistan Democratic Party
- Party of Democratic Kampuchea
- PDK (Porsche Doppelkupplungsgetriebe)#Porsche, dual clutch semi-auto gearbox used in the Porsche 956/962
- Phi Delta Kappa, an organization for educators
- Phosphoinositide-dependent kinase
- Platform Development Kit, a free software tool for creating custom GNU/Linux distributions
- Process Design Kit, a set of files for building chips for a specific technology (90 nm, 65 nm, and 45 nm) for a specific foundry
- Pyruvate dehydrogenase kinase
- PDK, a Kwaito performing group from Namibia