| Acronym | Definition |
|---|
| CSSF | Commission de Surveillance du Secteur Financier (Luxembourg) |
| CSSF | California State Science Fair |
| CSSF | Center for the Study of Science Fiction |
| CSSF | Cyprus Shooting Sport Federation |
| CSSF | Canadian Scientific Submersible Facility |
| CSSF | Comite de Soutien a la Scolarisation des Filles (French: Rural Girls Educational Support Committee) |
| CSSF | County School Service Fund |
| CSSF | Congregation of the Sisters of St. Felix (Felician Sisters) |
| CSSF | Civil Service Superannuation Fund (Canada) |
| CSSF | Canadian School Sports Federation |
| CSSF | Chicago Student Science Fair |
| CSSF | Calcine Solids Storage Facility |
| CSSF | Community Service Summer Fellowship |
| CSSF | C3 Systems Simulation Facility |
| CSSF | Congregation of Sisters Saint Felice Cantalicio, Felicians (religious order) |