| Abbreviation | Definition |
|---|---|
| CYC | Chester Yacht Club |
| CYC | Chicago Yacht Club |
| CYC | Chippewa Yacht Club |
| CYC | Cleveland Yachting Club |
| CYC | Corinthian Yacht Club |
| CYC | Coronado Yacht Club |
| CYCA | Clyde Yacht Clubs Association |
| CYCA | Cruising Yacht Club of Australia |
| CYCT | Corinthian Yacht Club of Tacoma |
| CYCT | Cruising Yacht Club of Tasmania |
| CYFC | Central Yorke Football Club |
| CYP | Club for Young People |
| CYPN | Clubs For Young People Northamptonshire |
| CYSC | Columbus YMCA Swim Club |
| CYVC | Circeo Yacht Vela Club |
| CZC | Current Zero Club |
| DAAC | Dover Area Aquatic Club |
| DAC | Denver Athletic Club |
| DAC | DeSoto Athletic Club |
| DAC | Detective Agency Club |