Football stadiums — O
- Oakwell StadiumBarnsley, United Kingdom
- Obed Itani Chilume StadiumFrancistown, Botswana
- Ochilview ParkStenhousemuir, Scotland
- Odense StadiumOdense, Denmark
- Ohio StadiumColumbus, United States
- Old TraffordManchester, United Kingdom
- Oliva Nova Sports CenterValencia, Spain
- OlympiaHelsingborg, Sweden
- OlympiastadionBerlin, Germany
- Olympic DiamniadioDakar, Senegal
- Olympic Stadium AthensAthens, Greece
- Olympique de la PontaiseLausanne, Switzerland
- Olympisch StadionAntwerp, Belgium
- Opel ArenaMainz, Germany
- Optus StadiumPerth, Australia
- Opus ArenaOsijek, Croatia
- Orlando City StadiumOrlando, United States
- Orlando StadiumJohannesburg, South Africa
- Orlen StadionPlock, Poland
- OstseestadionRostock, Germany
- Otto Schott SportzentrumMainz, Germany