| Acronym | Definition |
|---|
| ICA | International Council on Archives |
| ICA | Independent Component Analysis (signal processing) |
| ICA | Institute of Contemporary Art (various locations) |
| ICA | International Carwash Association |
| ICA | International Chiropractors Association |
| ICA | International Cartographic Association |
| ICA | Institute of Contemporary Arts (London, UK) |
| ICA | Internal Carotid Artery |
| ICA | Independent Computing Architecture (Citrix) |
| ICA | International Colored Gemstone Association |
| ICA | Independent Charities of America |
| ICA | Institute of Cultural Affairs |
| ICA | Instituto Colombiano Agropecuario (Colombia) |
| ICA | Interstitial Cystitis Association |
| ICA | Immigration and Checkpoints Authority (Singapore) |
| ICA | Institute of Chartered Accountants |
| ICA | International Cooperative Alliance (United Kingdom) |
| ICA | Instructions for Continued Airworthiness |
| ICA | Intercountry Adoption |
| ICA | Innovative Communications Alliance (Nortel and Microsoft) |
| ICA | Intercollegiate Athletics (various universities) |
| ICA | Ingenieros Civiles Asociados (México) |
| ICA | Institute for Connectivity in the Americas |
| ICA | International Coach Academy |
| ICA | International Communications Association (telecommunications end-user organization) |
| ICA | Irish Countrywomen's Association |
| ICA | Industrial Commission of Arizona |
| ICA | Intracranial Aneurysm |
| ICA | Instrumentation, Control and Automation |
| ICA | International Council for Information Technology in Government Administration |
| ICA | Invalid Care Allowance (UK) |
| ICA | Interbank Card Association |
| ICA | Independent Contractor Agreement |
| ICA | Iowa Cattlemen's Association |
| ICA | Intelligent Console Architecture |
| ICA | Infrastructure Corporation of America (Brentwood, TN) |
| ICA | Inter-Cultural Association of Greater Victoria (Canada) |
| ICA | Idaho Cattle Association |
| ICA | Interplanetary Commerce Administration (Avatar) |
| ICA | Investment Company of America |
| ICA | International Computer Association |
| ICA | International Christian Academy (Bouaké, Cote d'Ivoire) |
| ICA | Interuniversity Consortium for Agricultural and Related Sciences in Europe |
| ICA | International Cogeneration Alliance |
| ICA | International Contract Agency (Hitman game) |
| ICA | Intra-Application Communications Area |
| ICA | International Confectionery Association |
| ICA | In-Course Assessment |
| ICA | Integrated Chameleon Architecture (SGML) |
| ICA | Information Connection Architecture (SGI) |
| ICA | International Communications Agency |
| ICA | Independent Cost Analysis |
| ICA | International Cancer Alliance |
| ICA | Imputation Credit Account (New Zealand) |
| ICA | International Congress of Andrology |
| ICA | Integrated Communications Architecture |
| ICA | International Claims Association |
| ICA | International Cooperative Association |
| ICA | International Christian Adoptions |
| ICA | Iranian Chemists' Association |
| ICA | Ignition Control Additive (former Shell gasoline additive) |
| ICA | Information Communication Architecture |
| ICA | International Chess Academy |
| ICA | Internal Cerebral Artery |
| ICA | Insurance Consulting Associates |
| ICA | Irreversible Corrective Action |
| ICA | Interactive Convergence Algorithm |
| ICA | Iranian Corrosion Association |
| ICA | Interleaved Channel Assignment |
| ICA | Isocupressic Acid |
| ICA | Interface Connector Assembly |
| ICA | Immaculate Concepcion Academy (Philippines; Catholic girls' school) |
| ICA | Indene Carboxylic Acid |
| ICA | Intelligent Communications Adapter |
| ICA | Independent Cost Assessment |
| ICA | Institute of Company Accountants |
| ICA | Industrial Claims Association |
| ICA | Irish Curling Association |
| ICA | Integrated Computing Architecture |
| ICA | Interagency Cooperative Agreement |
| ICA | Intercompany Agreement |
| ICA | San Francisco Industrial Claims Association |
| ICA | Illinois Cosmetology Association, Inc. |
| ICA | Institute of Classical Archeology |
| ICA | Indemnisation pour le Compte d'Autrui (French: Indemnification Agreement on Behalf of Others; automobile insurance) |
| ICA | Independent Carriers Alliance |
| ICA | Iowa Coursing Association |
| ICA | Independent Contractor Agent (insurance) |
| ICA | Intelligent Channel Assignment |
| ICA | International Candlepin Alliance |
| ICA | Industrial Communications Association |
| ICA | Isolated Code Announcement |
| ICA | Inhaled AntiCholinergic |
| ICA | Internet Commerce Appliance (Ipivot) |
| ICA | Internal Control Administrator |
| ICA | International Council for Aquaculture (Philippines) |
| ICA | Internet Checksum Algorithm |
| ICA | Internet Caching Appliance (IBM) |
| ICA | Independent Communications & Alarm, Inc. |
| ICA | Isletcell Cytoplasm Autoantibody |
| ICA | Islamic Center of Alaska, Inc. |
| ICA | Inköpscentralerna Aktiebolag |
| ICA | International Criminologists Association (Italy) |
| ICA | International Commercial Arbitration (various organizations) |
| ICA | Industrial Control and Automation (various organizations) |
| ICA | Immediate Corrective Action (various organizations) |
| ICA | Investment Canada Act |
| ICA | Inglewood Cultural Arts (Inglewood, CA) |
| ICA | International Concertina Association (est. 1952) |
| ICA | Insurance Company Agent |
| ICA | Institute of Culinary Arts (various locations) |
| ICA | In Christ Alone (ministry) |
| ICA | International Current Affairs (various organizations) |