| Acronym | Definition |
|---|
| NHPA | National Historic Preservation Act of 1966 |
| NHPA | National Health Priority Areas (Australia) |
| NHPA | National Horseshoe Pitchers Association of America |
| NHPA | New Hampshire Preservation Alliance |
| NHPA | New Hampshire Psychological Association |
| NHPA | Natural History Photographic Agency (UK) |
| NHPA | National Health Promotion Associates |
| NHPA | New Hampshire Providers Association (Concord, NH) |
| NHPA | National High Performance Academy (Tennis Australia) |
| NHPA | New Hampshire Police Association |
| NHPA | NASA Headquarters Professional Association |
| NHPA | Nevada Highway Patrol Association (Winnemucca, NV) |
| NHPA | New Hampshire Press Association |
| NHPA | National Hispanic Psychological Association |
| NHPA | National Handicraft Promotion Agency (Mauritius) |
| NHPA | National Hijack Prevention Academy (South Africa) |
| NHPA | National Help Program Albania |
| NHPA | New Hampshire Planners Association |
| NHPA | National Hot Pepper Association |
| NHPA | National Home Protection Alliance |
| NHPA | North Hill Preservation Association |
| NHPA | New Hampshire Photojournalists Association |
| NHPA | Nurse Healers Professional Association |
| NHPA | Northland Heat Pump Association |
| NHPA | New Hampshire Pyrotechnics Association (est. 1989) |
| NHPA | National Hospitality and Parks Association |
| NHPA | New Health Plan Accreditation (National Committee for Quality Assurance) |
| NHPA | New Hampshire Paramedics Association |