| Abbreviation | Definition |
|---|---|
| NDP | Now Dead Politically |
| NDPA | National Democratic Party of Alabama |
| NDPD | National Democratic Party for Development |
| NDPL | National Democratic Party of Liberia |
| NDRC | National Democratic Redistricting Committee |
| NDSO | National Democratic Student Organization |
| NDSV | Nacionalno Dvisenie Simeon Tvori |
| NDTC | National Democratic Training Committee |
| NDYC | New Democratic Youth of Canada |
| NEC | National Ethics Committee |
| NED | National Endowment for Democracy |
| NEH | New Economic History (economics and political science) |
| NEPSA | New England Political Science Association |
| NepSi | European Network on Silica |
| NES | National Election Study |
| NF | Nation Forward |
| NF | National Front |
| NFD | Nouvelles Forces Démocratiques |
| NFPL | National Freedom Party of Liberia |
| NFR | Nueva Fuerza Republicana |