| Abbreviation | Definition |
|---|---|
| OUEC | Oxford University Exploration Club |
| OUFC | Ourimbah United Football Club |
| OUFC | Oxford United Football Club |
| OUFC | Oxford University Fencing Club |
| OUGC | Oxford University Gliding Club |
| OULC | Oxford University Labour Club |
| OUMC | Oxford University Mountaineering Club |
| OUQC | Oxford University Quidditch Club |
| OURC | Otago University Rowing Club |
| OUSSC | Oxford University Ski and Snowboard Club |
| OVAC | Ojai Valley Athletic Club |
| OVAC | Olympic Vintage Auto Club |
| OVC | Ocean Velo Club |
| OVC | Oranje Voetbal Club |
| OVRC | Ottawa Vintage Radio Club (Canada) |
| OVSC | Ontario Vintage Snowmobile Club |
| OVSC | Ossipee Valley Snowmobile Club |
| OVSC | Oxshott Village Sports Club |
| OWAC | Old Windsor Angling Club |
| OWC | Obedient Wives Club |