| Abbreviation | Definition |
|---|---|
| CR7 | Cristiano Ronaldo 7 (Jersey number) |
| CRFC | Canterbury Rugby Football Club |
| CRFL | Cross Roads Football League |
| CSFC | Centre for the Study of Football and its Communities |
| CSFC | Civil Service Football Club |
| CSFL | Central States Football League |
| CSFL | Collegiate Sprint Football League |
| CTFA | Chinese Taipei Football Association |
| CTGFFL | Cradle To Grave Fantasy Football League |
| CUFA | Cosmo United Football Academy |
| CVFC | Calgary Villains Football Club |
| CVFC | Canadian Valley Football Club |
| CVMFA | Cumberland Valley Midget Football Association |
| CWFA | Central Wales Football Association |
| CYF | Columbus Youth Football |
| CYFC | Cambridge Youth Football Club |
| CYFC | Cameron Youth Football and Cheer |
| CYFC | Central Yorke Football Club |
| CYFC | Clearview Youth Football Cheerleading |
| CYFL | Castle Youth Football League |