| Illinois Directors of Student Activities | Academic & Science |
| Industrial Designers Society of America | Academic & Science |
| Industrial Service of America | Business |
| Infectious Disease Society of America | Business |
| India Direct Selling Association | Business |
| Industrial Design Society Of America | Community |
| International Dance Sport Association | Community |
| Interior Design Student Association | Community |
| Indian Direct Selling Association | Community |
| Indian Direct Sellers Association | Community |
| Industrial Data Space Association | Community |
| Interactive Digital Software Association | Computing |
| Intend Driven Scenario Authoring | General |
| Industry Design Standards and Assessments | General |
| Independent Double Swing Arm | General |
| Indian Defence Studies Analysis | Governmental |
| Institute for Defence Studies and Analyses | Governmental |
| Interior Design Student Alliance | Governmental |
| Institute for Defense Studies and Analyses | Governmental |
| International Distance Skateboard Association | International |
| International Data Spaces Association | International |
| International Diplomatic Student Association | International |
| International Distance Skateboarding Association | International |
| I Designed Something Awful | Internet |
| Infectious Diseases Society of America | Medical |
| Institute for Democracy in South Africa | Regional |
| Irish Deaf Sports Association | Regional |
| International Diving Schools Association | Sports |
