Venues
| Name | Location | Capacity |
|---|---|---|
| Ocean Center | Daytona Beach, Florida | — |
| Odeum Expo Center | Villa Park, Illinois , United States | — |
| Office Depot Center | Sunrise, Florida | — |
| Ohio Expo Center | Columbus, Ohio | — |
| Okinawa Prefectural Budokan | Okinawa, Japan | — |
| Old Forester's Paristown Hall | Louisville, Kentucky | — |
| Omaha Civic Auditorium | Omaha, Nebraska | — |
| Onondaga County War Memorial | Syracuse, New York | — |
| Optus Stadium | Burswood, Western Australia, Australia | — |
| Oracle Arena | Oakland, California | — |
| Original Sports Bar | Philadelphia , Pennsylvania , United States | — |
| Orlando Arena | Orlando, Florida | — |
| Orleans Arena | Paradise, Nevada | — |
| Orleans Hotel & Casino | Paradise, Nevada | — |
| Osaka Dome | Osaka, Japan | — |
| Osaka Prefectural Gymnasium | Osaka, Japan | — |
| Osaka World Building | Osaka, Japan | — |
| Osaka World Hall | Osaka, Japan | — |
| Osaka-jo Hall | Osaka, Japan | — |
| Osaka-jō Hall | Osaka, Japan | — |
| Ota City General Gymnasium | Ota, Tokyo, Japan | — |
| Ottawa, Ontario, Canada | — | — |
| Owensboro Sportscenter | Owensboro, Kentucky | — |
| PNC Arena | Raleigh, North Carolina | — |
| PNE Coliseum | Vancouver, British Columbia, Canada | — |
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