| IAHA | Animal Husbandry Alliance 
| Others |
| IAHA | Idaho Amateur Hockey Association
| Others |
| IAHA | Illinois Association of Healthcare Attorneys
| Others |
| IAHA | Illinois Association of Housing Authorities
| Others |
| IAHA | Immune Adherence Hemagglutination Assay
| Others |
| IAHA | Independence Airpark Homeowners Association
| Others |
| IAHA | Indianapolis Amateur Hockey Association
| Others |
| IAHA | Indicative Access Holder Agreement
| Others |
| IAHA | Indigenous Allied Health Australia
| Others |
| IAHA | Inter American Health Alliance
| Others |
| IAHA | International Air and Hospitality Academy
| Others |
| IAHA | International Arabian Horse Association
| Others |
| IAHA | International Association of Hospitality Accountants
| Others |
| IAHA | Intra Articular Hyaluronic Acid
| Others |
| IAHA | Ithaca Adult Hockey Association
| Others |