| Abbreviation | Definition |
|---|---|
| NPAT | National Patient Air Travel |
| NPAT | National Peace Accord Trust |
| NPAT | Native Prairies Association of Texas |
| NPCA | National Parks Conservation Association |
| NPCA | National Peace Corps Association |
| NPCAA | National Precast Concrete Association Australia |
| NPCC | National Prostate Cancer Coalition |
| NPCCF | National Prostate Cancer Coalition Fund |
| NPD | Non Payment of Dues |
| NPDA | National Parliamentary Debate Association |
| NPDF | National Police Defense Foundation |
| NPF | National Park Foundation |
| NPF | National Parkinson Foundation |
| NPF | National Psoriasis Foundation |
| NPF | Needy People Foundation |
| NPFI | National Parkinson Foundation, Inc. |
| NPFI | National Program Fund Initiative |
| NPFI | National Psoriasis Foundation, Inc. |
| NPG | Negative Population Growth |
| NPGSF | Naval PostGraduate School Foundation |