| Acronym | Definition |
|---|
| NHA | Nha Trang, Vietnam (airport code) |
| NHA | National Hydrogen Association |
| NHA | Nursing Home Administrator |
| NHA | National Housing Authority (Philippines) |
| NHA | National Hockey Association (Canada) |
| NHA | National Highway Authority (Pakistan) |
| NHA | Nantucket Historical Association |
| NHA | National Highway Authority |
| NHA | National Health Accounts |
| NHA | National Housing Act (of 1938; Canada) |
| NHA | New Hope Academy (various locations) |
| NHA | National Humanities Alliance |
| NHA | National Healthcareer Association |
| NHA | National Heritage Area (NPS) |
| NHA | National Heritage Academies |
| NHA | Non-Human Animal |
| NHA | Navajo Housing Authority |
| NHA | Next Higher Assembly |
| NHA | Natural History Association |
| NHA | Nashville Humane Association |
| NHA | Naval Helicopter Association |
| NHA | Nomura Holding America (Nomura Securities Co., Ltd.) |
| NHA | National Hay Association (St. Petersburg, Fl) |
| NHA | National Health Access |
| NHA | Natural History Area |
| NHA | Next Hop Array (computer networking) |
| NHA | New Housing Authority (finance) |
| NHA | National Hop Association (UK) |
| NHA | Nice Hand All (card games) |
| NHA | Non-Hazardous Area |
| NHA | Non Hostile Action |
| NHA | Northern Heights Alliance |
| NHA | National Handbag Association |
| NHA | National Hacker Association |
| NHA | Neuchatel Hier Automobile (French; automobile club; Switzerland; est. 1977) |