| IMPA | Idaho Milk Processors Association 
| Others |
| IMPA | Indian Medical Professional Association
| Others |
| IMPA | Indiana Municipal Power Agency
| Others |
| IMPA | Individual Market Participant Analysis
| Others |
| IMPA | Inner Melbourne Planning Alliance
| Others |
| IMPA | Instrumental Music Parents Association
| Others |
| IMPA | Integrated Master in Professional Accounting
| Others |
| IMPA | Intelligent Multi Port Adapter
| Others |
| IMPA | International Marine Purchasing Association
| Others |
| IMPA | International Maritime Pilots Association
| Others |
| IMPA | International Maritime Pilots' Association
| Others |
| IMPA | International Master of Public Administration
| Others |
| IMPA | International Master Program of Agriculture
| Others |
| IMPA | International Mission Photography Archive
| Others |
| IMPA | International Motor Press Association
| Others |
| IMPA | Internet Movie Poster Awards
| Others |
| IMPA | Iowa Meat Processors Association
| Others |
| IMPA | Iowa Motion Picture Association
| Others |
| IMPA | Iowa Motion Picture Awards
| Others |
| IMPA | Isopropyl Methyl Phosphonic Acid
| Others |