ICN

ICN is a three letter abbreviation that may refer to:
* ICN Graduate Business School, French graduate business school in Nancy.
* IATA Code for Incheon International Airport near Seoul, South Korea
* Independent Catholic News, a Catholic news website
* UCL Institute of Cognitive Neuroscience, an interdisciplinary grouping of physicians and scientists that is part of University College London
* International Competition Network a regulators association.
* International Council of Nurses, a federation of national nursing associations
* Iodine cyanide, a pseudohalogen with formula ICN or CNI
* Iowa Communications Network, an Iowa state agency
* Valeant Pharmaceuticals International, formerly named "ICN Pharmaceuticals", and prior to that "ICN Radiochemicals"
* The iCN range of GPS Navigation products from Navman
* The "ICN (Intercity-Neigezug)", a Swiss Intercity Tilting Train
* The "ICN", a Croatian Tilting Train
* The Integrated Computing Network maintained by the Los Alamos National Laboratory
* The International Council of Nurses
* Internal Control Number, a unique number assigned by carriers to medical claims
* Iranian Carbonate Network