Calcio Squadre che iniziano con Ö
- Orgullo Surtam
- Oceanía FC
- Olimpia Asunción U19
- Olympique de Valence
- Olympic Star Muyinga FC
- Ol Beirutus (W)
- Ostrovia 1909 Ostrow Wielkopolski (W)
- OM Saidham
- Olympique Magrane
- Olympique Magrane U21
- Östersunds Ik
- Oklahoma State Cowboys
- Oklahoma Sooners
- Oregon State Beavers
- Ohio State Buckeyes
- Ole Miss Rebels
- Oregon Ducks
- Ole Miss Rebels (W)
- Oklahoma City Thunder
- Olympiada Lympion
- Omonia Psevda
- Orestis Orestiadas
- Oberá Tenis Club
- Orvietana
- Olympique-lyonnais-u21
- Oued-ellil
- Olympique Lyonnais (Youth)
- Olimpia Csu Brasov Women
- Olimpia Milano
- Oxygen Roma Women
- Otzma Beer Sheva
- Örebro HK
- Old Dominion Monarchs
- Ohio Bobcats