| Abbreviation | Definition |
|---|---|
| IDYU | International Democratic Youth Union |
| IEPP | Indigenous Electoral Participation Program |
| IFDP | Indian Federal Democratic Party |
| IFET | International Federation for East Timor |
| IFM | Isatabu Freedom Movement |
| IFOSA | Iran Foreign Oil Sanctions Act |
| IGO | Igorot Global Organization |
| IHDC | Indiana House Democratic Caucus |
| IIG | Iraqi Interim Government |
| IISP | Independent Institute of Social Policy |
| IJI | Islami Jamhoori Ittehad |
| IJP | International Justice Party |
| ILAR | Independent Libertarian Antiderative Republic |
| ILP | Independent Labor Party |
| IM | Iron Maiden |
| IMPAC | Indiana Medical Political Action Committee |
| IMPD | Institute for Multi-Party Democracy |
| IMPD | International Movement Of Parliamentarians For Democracy |
| IND | Incredible New Democrat |
| INDEP | Independent |