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| Chew Valley Lake Sailing Club | View |
| Chichester Yacht Club Limited | View |
| Chippenham Sailing Club | View |
| Chipstead Sailing Club | View |
| Christchurch Sailing Club | View |
| Civil Service Sailing Association | View |
| Clacton On Sea Sailing Club | View |
| Clevedon Sailing Club | View |
| Clyde Cruising Club | View |
| Clyde Yacht Clubs Association | View |
| Clywedog Sailing Club | View |
| Cody Sailing Club | View |
| Colne Yacht Club | View |
| Cookham Reach Sailing Club | View |
| Coquet Shorebase Trust | View |