| Abbreviation | Definition |
|---|---|
| ICREA | Iowa Commercial Real Estate Association |
| ICSA | Independent Carrier Safety Association |
| ICSA | Inter Collegiate Sailing Association |
| ICSA | International Cell Senescence Association |
| ICSA | International Chinese Sociological Association |
| ICTA | International Clinical Trials Association |
| ICTA | International Cupping Therapy Association |
| ICVA | Independent Custody Visiting Association |
| IDA | International Desalination Association |
| IDA | International Detailing Association |
| IDA | International Dispensary Association |
| IDA | International Documentary Association |
| IDA | International Doors Association |
| IDA | International Downtown Association |
| IDAC | Infectious Disease Association of California |
| IDAL | Intellectual Disability Association of Lesotho |
| IDALA | International Dyslexia Association Los Angeles |
| IDBA | Indo Danish Business Association |
| IDBA | Irish Dragon Boat Association |
| IDCA | Interdisciplinary Design and Construction Association |