| Abbreviation | Definition |
|---|---|
| HVPA | Huron Valley Physicians Association |
| HVTA | Hampton Village Traders Association |
| HVTA | Hawaii Veterinary Technician Association |
| HVTA | Historical Vintage Truck Association |
| HWA | Horror Writers Association |
| HWHA | Hmong Women Heritage Association |
| HWPA | Horserace Writers Photographers Association |
| HWRA | Harper Woods Retirees Association |
| HWRA | Hinchley Wood Residents Association |
| HWTA | Harbor Walk Townhouse Association |
| HWTA | Hartley Wintney Twinning Association |
| HWTA | Harvest Wind Townhome Association |
| HWTA | Hiawatha Water Trail Association |
| HYBA | Hanoi Young Business Association |
| HYBA | Hellenic Yacht Brokers Association |
| HYPERDELLIC | Helpful Young Patient Encouraging Reassuring Derpy Enthustic Laughing Lending Skilled Caring |
| HYRA | Hawaii Yacht Racing Association |
| IAA | IACUC Administrators Association |
| IAA | Independent Ambulance Association |
| IAA | Indian Association of Alberta |