| Acronym | Definition |
|---|
| IHR | Institute for Historical Review (Orange Country, California) |
| IHR | International Health Regulations |
| IHR | Internet Health Resources |
| IHR | Institute for Health and Recovery (Cambridge, MA) |
| IHR | International Human Rights (est. 1996) |
| IHR | Inside Home Recording (podcast) |
| IHR | Interactive Hypertext Response |
| IHR | Integrated Heater Control |
| IHR | Institute for Humanities Research (Tempe, AZ) |
| IHR | Ideal Home Range (Essen, Germany) |
| IHR | Institute for Health Research (Lancaster University, UK) |
| IHR | International Human Resources |
| IHR | Institute of Hearing Research (UK) |
| IHR | Irish Horse Register (UK) |
| IHR | Interstate Hotels and Resorts (Arlington, VA) |
| IHR | Institute for Historical Research |
| IHR | International History Review |
| IHR | Islam and Human Rights |
| IHR | I Heart Rummage (Seattle, WA) |
| IHR | Institut d'Histoire de la Réformation (French) |
| IHR | Inguinal Hernia Repair (surgery) |
| IHR | Indiana Horse Rescue (West Lafayette, IN) |
| IHR | Institute of Human Resources (various locations) |
| IHR | Ionic Hair Retexturising |
| IHR | Interhemisphere Ratio |
| IHR | In-Extremis Hostage Rescue |
| IHR | Incremental Heat Rate (utility industry) |
| IHR | Integrated Health Records (UK) |
| IHR | Italian Hardware Research (Galliate, Italy) |
| IHR | Internet Health Report (Keynote Systems, Inc.) |
| IHR | Integrated Hierarchical Representation |
| IHR | Iroquois Hill Runners (Louisville, KY) |
| IHR | Internally Heated Resonators |
| IHR | Ilizarov Hip Reconstruction |