ICN may refer to:
Organizations ICN Pharmaceuticals or ICN Radiochemicals, now Valeant Pharmaceuticals, a Canadian multinational ICN Radio, an Italian-language radio in New York City Information Communications Network LLC, a company in Mongolia Inside Climate News, American news organization International Code of Nomenclature for algae, fungi, and plants, code of scientific nomenclature International Competition Network a regulators association International Council of Nurses, a federation of national nursing associations Iowa Communications Network, an Iowa state agency
Educational institutes ICN Graduate Business School, a French graduate business school in Nancy UCL Institute of Cognitive Neuroscience, a group of physicians and scientists at University College London
Computing and communication technology iCN GPS, a range of GPS navigation products from Navman Illinois Century Network, an operation by the Illinois Department of Central Management Services Information-centric networking Integrated Computing Network, maintained by the Los Alamos National Laboratory
History Imperial Chinese Navy, a navy of China from 1875 until the end of Qing Empire in 1912
Shipyards Itaguaí Construções Navais, a Brazilian state-owned shipyard also known as ICN
Science and medicine Inclusion conjunctivitis of the newborn, in medicine Intensive care nursery, alternative name for Neonatal intensive care unit International Code of Nomenclature for algae, fungi, and plants, in algology, mycology, and botany Iodine cyanide, a pseudohalogen with formula ICN or CNI
Transportation ICN (SBB-CFF-FFS), a Swiss intercity tilting passenger train Incheon International Airport, near Seoul, South Korea (by IATA airport code) InterCity Nagibni, or RegioSwinger, a Croatian tilting diesel passenger train
Other Indigenous Corporation Number, as registered by the Office of the Registrar of Indigenous Corporations in Australia International Communications Network, former name of now-defunct National Broadcasting Network (Trinidad and Tobago)