| IAPA | Idaho Academy Of Physician Assistants 
| Others |
| IAPA | Idaho Association of Public Accountants
| Others |
| IAPA | Illinois Academy of Physician Assistants
| Others |
| IAPA | Illinois Activity Professionals Association
| Others |
| IAPA | Illinois Asphalt Pavement Association
| Others |
| IAPA | Impact Assessment and Project Appraisal
| Others |
| IAPA | Independent Airport Parking Association
| Others |
| IAPA | Independent Automotive
| Others |
| IAPA | Independent Automotive Professionals Association
| Others |
| IAPA | Indian Association of Paediatric Anaesthesiologists
| Others |
| IAPA | Indian Association of Physician Assistants
| Others |
| IAPA | Indiana Academy of Physician Assistants
| Others |
| IAPA | Indo American Psychiatric Association
| Others |
| IAPA | Industrial Accident Prevention Association
| Others |
| IAPA | Institute of Analytics Professionals of Australia
| Others |
| IAPA | Instrument Approach Procedures Automation
| Others |
| IAPA | Inter American Press Association
| Others |
| IAPA | International Adventure Park Association
| Others |
| IAPA | International Adventure Park Association International
| Others |
| IAPA | International Affairs Policy and Analysis
| Others |
| IAPA | International Airline Passenger Association
| Others |
| IAPA | International Airline Passengers Association
| Others |
| IAPA | International Alliance for the Prevention of AIDS
| Others |
| IAPA | International Alliance of Protected Areas
| Others |
| IAPA | International Association of Physicians in Audiology
| Others |
| IAPA | International Association of Physiologic Aesthetics
| Others |
| IAPA | International Association of Practising Accountants
| Others |
| IAPA | International Association of Professional Advisers
| Others |
| IAPA | International Au Pair Agencies
| Others |
| IAPA | International Au Pair Association
| Others |
| IAPA | International Award for Public Art
| Others |
| IAPA | International Awards for Powered Access
| Others |
| IAPA | Iowa Administrative Procedures Act
| Others |
| IAPA | Iranian American Parents Association
| Others |
| IAPA | Italian American Police Association
| Others |