| Abbreviation | Definition |
|---|---|
| IHS | Indian Health Service |
| IHS | Indian Health Service (DHHS) |
| IIE | Integrated Information Environment |
| IIG | Independent Investigations Group |
| IIO | International Investment Office |
| IIP | Bureau of International Information Program |
| IIP | Index Of Industrial Production |
| ILA | I Love America |
| ILA | International Language Academy |
| ILAB | Bureau of International Labor Affairs |
| ILM | Intermediate Labor Market |
| ILRF | Interagency Labor Relations Forum |
| ILSBC | International Lake Superior Board of Control |
| ILSC | International Labor Statistics Center, Bureau of Labor Statistics |
| IMA | Interim Measures Agreement |
| IMAG | Infrastructure Monitoring And Advisory Group |
| IMB | International Maritime Boundary |
| IMBL | International Maritime Boundary Line |
| IMBRA | International Marriage Broker Regulation Act |
| IMDS | International Material Data System |