| Abbreviation | Definition |
|---|---|
| ICWG | Inter-Center Working Group |
| IDAP | Interim Disability Assistance Program |
| IDAP | Iowa Domestic Abuse Program |
| IDCO | Interim Development Control Ordinance |
| IDED | Iowa Department of Economic Development |
| IDES | Illinois Department of Employment Security |
| IDLD | Iowa Distance Learning Database |
| IDO | Investment and Development Office |
| IDOA | Illinois Department of Aging |
| IDOA | Illinois Department of Agriculture |
| IDOA | Indiana Department of Administration |
| IDOE | Indiana Department of Education |
| IDPH | Iowa Department of Public Health |
| IDRB | Industrial Development Revenue Bond |
| IDRC | Intoxicated Driver Resource Center |
| IDT | Israeli Day Time |
| IDWG | Inter-Departmental Working Group |
| IE | Inland Empire |
| IECC | Illinois Energy Conservation Code |
| IEPN | Institute of Ecological Problems of the North |