Football Équipes commençant par O
- OFK Backa Palanka
- Olimpic Zarnesti II
- OKS Stomil Olsztyn II
- Orlando Pirates U23
- Omarska
- OFK Mihajlovac
- Onet Le Chateau Football
- One Rocket
- Oviedo Moderno B
- Ogre United
- Ossett United
- Olympique Geneve FC
- Once Ahuachapan II
- Operario Amazonas
- Olancho Reserves
- Olympiacos Piraeus II
- Olympique De Geneve FC
- Orca Kamogawa FC
- Omiya Ardija Ventus (W)
- Ormidias
- Oliver Mueller
- Once Lobos Chalchuapa
- Olympique Marseille Women
- Olympiacos (U 19)
- Once Lobos
- OFK Petrovac U19
- Olympique Lyonnais U19 (Wom)
- ODR Petrovaradin U19
- Organica Masachapa U20
- Odds Ballklubb 2
- Odysseas Moschato (Women)
- Olympiakos Piraeus B
- Odysseas Glyfadas
- Olimpiada Imittou AS