CPN

CPN may refer to:
 * Calpine Corporation, New York Stock Exchange symbol CPN
 * Canadian Perinatal Network
 * Carnivorous Plant Newsletter
 * Carpinteria (Amtrak station), California, Amtrak station code CPN
 * Caspian Airlines (Iran), ICAO airline designator CPN
 * Celiac plexus neurolysis, in medicine, the chemical ablation of the celiac plexus
 * Central Park North (disambiguation)
 * Central Pattana, Stock Exchange of Thailand symbol CPN
 * Chlamydia pneumoniae, generally Cpn or CpN
 * Citizen Potawatomi Nation, a federally recognized tribe of Potawatomi people located in Oklahoma
 * Clapham North tube station, London, London Underground station code CPN
 * Coloured Petri net
 * Communist Party of Nepal
 * Communist Party of the Netherlands
 * Community psychiatric nurse
 * Complex projective space, $$\mathbb{C}\mathrm{P}^n$$
 * Confederation of the Polish Nobility
 * Country and Progressive National Party, early 20th-century political party in Queensland, Australia
 * Lysine carboxypeptidase, an enzyme
 * Community Protection Notice in the United Kingdom