| Acronym | Definition |
|---|
| FNSC | Fédération Nationale du Secteur des Communes (French: National Commons Sector Federation; Algéria) |
| FNSC | Fédération pour une Nouvelle Société Calédonienne (French: Federation for a New Caledonian Society) |
| FNSC | Fundación Nuestra Señora del Camino (Spanish: Our Lady of the Way Foundation; Panama) |
| FNSC | Fédération Nationale des Syndicats Chinois (French: Chinese National Federation of Trade Unions) |
| FNSC | Foothills Nordic Ski Club (Calgary, Alberta, Canada) |
| FNSC | First Night State College (New Year event; State College, PA) |
| FNSC | Food and Nutrition Science |
| FNSC | Forensic Nurses' Society of Canada (est. 2007) |