Fußball Mannschaften, die mit O beginnen
- Oakleigh Cannons U23
- Olympique DAles En Cevennes
- Omonia FC Aradippou
- Olympias Lympia
- Ornament
- Olympic Star
- Once Deportivo Reserves
- Olympic Star FC
- Once Deportivo Ahuachapan (R)
- Oceania Futbol Club
- Old Melburnians SC
- Olimpia Occidental LEC
- OFK Partizan Cherven Bryag
- ORL Magic
- O´Higgins FC U21
- Oxford United LFC
- Once Deportivo De Ahuachapan (Wom)
- Olympique Saint Quentinois
- Ordino
- Orlando Pirates Reserves
- Oviedo Moderno CF B
- Oakleigh Cannons FC U23
- OBSON Dynamo FC
- Olympic Football Club
- Obson Dynamo
- Oranje Fc
- Olympic FC Women NPL Women
- Operario VG
- Operário Ltda.
- Orange Waratahs FC
- Ourimbah United FC
- Operario De Campo Grande MS
- Ockero IF
- O Magrane U21