| Iran Color Research Center | Academic & Science |
| International Cosmic Ray Conference | Academic & Science |
| Innovative Construction Research Centre | Academic & Science |
| Intel China Research Center | Academic & Science |
| International Clinical Research Center | Academic & Science |
| Insurance City Repeater Club | Academic & Science |
| Injury Control Research Center | Academic & Science |
| Injury Control Research Centers | Academic & Science |
| Integrated Concepts And Research Corporation | Business |
| International Criminal Rehabilitation Confederation | Community |
| International Conference of Reformed Churches | Community |
| Inter Club Race Committee | Community |
| Int Committee of the Red Cross | Community |
| International Committee of the Red Cross | Community |
| International Conference on Rebooting Computing | Computing |
| Invariant Crc | Computing |
| Illinois Center Right Coalition | General |
| Indiana Civil Rights Commission | General |
| International Crisis Risk Communication | General |
| Independent Citizens Redistricting Commission | General |
| Iowa Civil Rights Commission | General |
| Irmo Chapin Recreation Commission | General |
| Issoire Cournon Retromobile Club | General |
| Inner Cities Religious Council | Governmental |
| Interagency Classification Review Committee | Governmental |
| Infrastructure and Concession Regulatory Commission | Governmental |
| Infrastructure Concession Regulatory Commission | Governmental |
| International Crisis and Risk Communication | International |
| International Committee of Red Cross | International |
| Introduction to Cancer Research Careers | Medical |
| Inquiries, Complaints and Reports Committee | Medical |
