| Abbreviation | Definition |
|---|---|
| CS | Club Sport |
| CSB | Clube Slot de Braga |
| CSBCA | Chester Street Block Club Assocation |
| CSCA | Clumber Spaniel Club of America |
| CSCC | Cascade Sports Car Club |
| CSCN | Celtic Supporters Club in Norway |
| CSDAC | California Shelby Dodge Automobile Club |
| CSEC | Chicago Sunday Evening Club |
| CSFC | Charles Sturt Fencing Club |
| CSFC | Chelsea Swedish Fan Club |
| CSFC | Civil Service Football Club |
| CSFC | Counties Sport Fishing Club |
| CSFC | Counties Sports Fishing Club |
| CSFF | Club Social Francophone et Francophile |
| CSGC | Callippe Senior Golf Club |
| CSGC | Crown Service Gliding Club |
| CSGL | Club des Sports de Glace de Lyon |
| CSGSA | Club des Sports de Glace Strasbourg Alsace |
| CSGSA | Club des sports sur glace Strasbourg Alsace |
| CSHL | Club Sportif de Hammam-Lif |