| Abbreviation | Definition |
|---|---|
| PD | Progressive Democrats |
| PDA | Progressive Democrats of America |
| PDB | Partido del Bierzo |
| PDC | Pacte Democratic per Catalunya |
| PDC | Partido Demócrata Cristiano |
| PDC | People For Democratic Change |
| PDCI | Partners for Democratic Change International |
| PDCL | Partido Demócrata de Castile y León |
| PDCS | Partito Democratico Cristiano Sammarinese |
| PDCS | Partners for Democratic Change Slovakia |
| PDFG | Partito Democratico Forza Gnocca |
| PDFG | Political Development Feedback Group |
| PDFI | Peoples Democratic Front of India |
| PDFLP | Popular Democratic Front for the Liberation of Palestine |
| PDG | Parti Democratique Gabonais |
| PDG | Partido Demócrata Gallego |
| PDI | Progressive Democrats of Illinois |
| PDK | Partai Demokrasi Kebangsaan (Indonesian: National Democratic Party) |
| PDK | Partia Demokratike e Kosovës (Albanian: Democratic Party of Kosovo) |
| PDK | Partia Demokristiane e Shqipërisë (Albanian Christian Democratic Party) |