| Abbreviation | Definition |
|---|---|
| OVSC | Ohio Valley Ski Council |
| OVW | Ohio Valley Wrestling |
| OWA | Oratory Wrestling Alliance |
| OWA | Outpost Wilderness Adventure |
| OWAC | Ohio Wesleyan Athletic Council |
| OWC | Orangemen Wrestling Commision |
| OWDB | One World Dragon Boat |
| OWF | Official Wrestling Federation |
| OWF | Outlaw Wrestling Federation |
| OWG | Olympic Winter Games |
| OWL | Outlaw Wrestling League |
| OWP | Offensive Winning Percentage |
| OWT | On Water Training |
| OYAA | Olentangy Youth Athletic Association |
| OYB | Ohio Youth Baseball |
| OYB | Ohio Youth Basketball |
| OYB | Orem Youth Baseball |
| OYC | Oakland Yacht Club |
| OYC | Occoquan Yacht Club |
| OYC | OceansideYacht Club |