PCD may refer to:
- Partido Conservador Demócrata, a political party in Nicaragua
- Partnership for Child Development, seeks to improve health and nutrition in school-age children in low-income countries, formed in 1992
- Pussycat Dolls, an American pop and R&B, and dance and burlesque ensemble
- PCD (album), their debut album
- Primary ciliary dyskinesia, a rare autosomal recessive genetic disorder
- Photo CD, a system designed by Kodak for digitizing and storing photos in a CD, launched in 1992
- Picture CD, a product by Kodak, following on from the earlier Photo CD product
- Phillips, Craig and Dean, a Contemporary Christian Music trio
- Pitch Circle Diameter, in mechanical drawing, particularly in relation to wheel or axial fan sizing, see Wheel sizing#Bolt circle
- Programmed cell death, the suicide of a cell in a multicellular organism
- Paraneoplastic cerebellar degeneration, an autoimmune reaction targeted against components of the central nervous system
- Protein C deficiency, a rare genetic disorder increasing the likelihood of thrombotic disease, especially after the administration of the drug warfarin
- Protein-coated disc, a theoretical optical disc technology
- Providence Country Day School, a private middle and high school located in East Providence, Rhode Island
- Polycrystalline diamond
- Portable Computing Device, small computers for mobile computing
- The ISO 639-3 language code of Picard, a language of France
- Process Control Daemon - An open source process controller for Embedded Linux
- Personal Communications Devices - partners with mobile phone manufacturers