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| Oban Sailing Club | View |
| ODSSA | View |
| Orford Sailing Club | View |
| Orkney Sailing Club | View |
| Orwell Yacht Club | View |
| Otley Sailing Club | View |
| Ouse Amateur Sailing Club | View |
| Oxford Brookes University Sailing Club | View |
| Oxford Sailing Club | View |
| Oxford University Yacht Club | View |
| Ogston Sailing Club | View |
| Olympic Sailing Centre - Marina Delta Falirou | View |
| Ocean Marina Yacht Club | View |