| Abbreviation | Definition |
|---|---|
| IESA | Indiana Education Savings Authority |
| IETA | Inheritance and Estate Tax Act |
| IFA | Indiana Finance Authority |
| IFA | Iowa Finance Authority |
| IFC | Inter Fraternal Council |
| IFP | Indiana Fiscal Policy |
| IFPI | Indiana Fiscal Policy Institute |
| IGBST | Interagency Grizzly Bear Study Team |
| IGIS | Interactive Geographic Information System |
| IHP | Infant Hearing Program |
| IHSB | Intergovernmental Health Services Bureau |
| IHSB | Intergovernmental Human Services Bureau |
| IIC | Intercultural Institute of California |
| IIRC | Interactive Illinois Report Card |
| IISC | Iowa-Illinois Safety Council |
| ILEAS | Illinois Law Enforcement Alarm System |
| ILL | Illinois |
| ILO | Instant Lottery Office |
| ILRC | Indiana Lobby Registration Commission |
| IMAC | Intensive Multidisciplinary Assessment Camp |