| Acronym | Definition |
|---|
| ICN | International Council of Nurses (Conseil International des Infirmières) |
| ICN | Intercondylar Notch (knee) |
| ICN | International Congress of Nutrition |
| ICN | Iowa Communications Network |
| ICN | Interstitial Cystitis Network |
| ICN | Instituto da Conservação da Natureza (Portugal) |
| ICN | Icon File |
| ICN | Inter Change Node |
| ICN | Inter Connecting Network |
| ICN | Inventory Control Number |
| ICN | Information and Communication System |
| ICN | Internet Call Notification |
| ICN | In-Car Navigation (software) |
| ICN | International Competition Network |
| ICN | I Care Not |
| ICN | Industry Capability Network (Australian and New Zealand) |
| ICN | International Computer Network (data management company) |
| ICN | Internal Control Number |
| ICN | Indiana College Network |
| ICN | International Conference on Networking |
| ICN | Intensive Care Nursery |
| ICN | Institute of Cognitive Neuroscience (University College London) |
| ICN | Infection Control Nurse |
| ICN | Illinois Century Network |
| ICN | Isocyanate |
| ICN | Interface Control Net (US DoD) |
| ICN | Independent Comedy Network (video content portal) |
| ICN | Invoice Control Number (billing) |
| ICN | Item Control Number |
| ICN | Information and Communications Networks (Siemens AG) |
| ICN | Integrated Computing Network |
| ICN | Idle Channel Noise (Sprint) |
| ICN | Interim Change Notice |
| ICN | Information Control Net (modeling language) |
| ICN | Institute of Communication Networks |
| ICN | Islamic Center of Naperville |
| ICN | Independent Communications Network |
| ICN | Interconnecting CCS Network (Telcordia) |
| ICN | International CUG Number (ANSI, ITU-T) |
| ICN | Interface Change Notice |
| ICN | Implementation Change Notice |
| ICN | Intercentre Network |
| ICN | Inter-Array Correlation-Neglecting |
| ICN | Inchon International Airport, Korea (Airport Code) |
| ICN | Internal Call Notification (telecommunications) |
| ICN | Interchangeability Control Number |
| ICN | Integrated Campus Network |
| ICN | Interactive Collaborative Narrative |
| ICN | Importer's Clearance Number (Australian government) |