PCB may refer to:
Science and technology:
- Printed circuit board, a board used in electronics
- PCB (software), software to design printed circuit boards
- PCBoard, bulletin board software for MS-DOS
- Polychlorinated biphenyls, organic compounds
- Plenum chamber burning, proposed jet engine technology for the thrust vectoring Rolls-Royce Pegasus engine
- Power circuit breaker, an automatically operated electrical switch
- Process control block, a data structure in software
- PCB Piezotronics, a manufacturer of piezoelectric sensors
Government:
- Brazilian Communist Party, Partido Comunista Brasileiro
- Communist Party of Bolivia, Partido Comunista de Bolivia
- Police Complaints Board, in England and Wales
Other uses:
- Pakistan Cricket Board, national regulatory board for cricket in Pakistan
- Panama City Beach, Florida
- Prifysgol Cymru, Bangor, a university in Wales
- Peake's commentary on the Bible, a book of Biblical scholarship
- Perfect Cherry Blossom, a computer game
- Phelps County Bank, a bank in Missouri, United States
- Police call box in the United Kingdom
- Public call box, alternative term for telephone booth