ICN

ICN is a three letter abbreviation that may refer to:

Incheon International Airport in 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 an 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 Radiochemcials"
The iCN range of GPS Navigation products from Navman
The Intercity-Neigezug, a Swiss Intercity Tilting Train