| Inter Campus Cost Allocation | Academic & Science |
| International Council of Commercial Arbitration | Business |
| Inter County Contractors Association | Business |
| Italian Canadian Cultural Association | Community |
| India Canada Cultural Association | Community |
| International Competition of Collegiate Accapella | Community |
| International Community Corrections Association | Community |
| Iowa Cheerleading Coaches Association | Community |
| Indigenous and Community Conserved Area | Community |
| International Collegiate Championships of A Cappella | Community |
| International Conservation Chiefs Academy | Community |
| Informatics and Computing Consulting Association | Computing |
| Independent Computer Consultant Association | Computing |
| International Computer Chess Association | General |
| Illinois Cheerleading Coaches | General |
| Infiniti Car Club of America | General |
| Iowa Cultural Corridor Alliance | Governmental |
| Instituto de Crédito de las Cajas de Ahorro | International |
| International Congress and Convention Association | International |
| International Corrugated Case Association | International |
| International Conference on Climate Action | International |
| International Corporate Chefs Association | International |
| International Correspondence of Corkscrew Addicts | International |
| International Championship of Collegiate Acapella | International |
| International Council for Commercial Arbitration | International |
| International Council of Chemical Associations | International |
| International Correspondence Chess Association | International |
| International Christian Coaching Association | International |
| International Championship of Collegiate A | International |
| International Competition of Collegiate A | International |
| International Chrysler Collector Association | International |
| IntelliSpace Critical Care and Anesthesia | Medical |
