| Abbreviation | Definition |
|---|---|
| CHSA | Canyon Hills Soccer Association |
| CHSA | Colonial Heights Soccer Association |
| CHSC | Cherry Hill Soccer Club |
| CHSS | Cincinnati Hills SAY Soccer |
| CIASA | Central Indiana Amateur Soccer Association |
| CISL | Central Iowa Soccer League |
| CISL | Continental Indoor Soccer League |
| CMSA | Central Maryland Soccer Association |
| CMSCA | Central Mass Soccer Coaches Association |
| CMSL | Catholic Metro Soccer League |
| CMSO | Central Massachusetts Soccer Officials |
| CMSTS | Colorado Mountain Soccer Tournament Series |
| CNSL | Canadian National Soccer League |
| CONCACAF | Confederation Of North Central American and Caribbean Association Football |
| COSA | Central Ohio Soccer Association |
| COSL | Central Oregon Soccer League |
| CPSL | Canadian Professional Soccer League |
| CPSL | Charlotte Premier Soccer League |
| CPSL | Columbus Premier Soccer League |
| CRDSA | Cristiano Ronaldo Dos Santos Aveiro |