Calcio Squadre che iniziano con Ö
- Operario Ltda U20
- Orel Minsk
- OZD Sayovolgi
- Operario FC Ltda U20
- Operário FC MT U20
- Orthodox
- Ottawa Redblacks
- Onehunga Mangere United AFC
- Onehunga Mangere United
- Orzel Pawlowice Wroclaw
- Olympie Tyn Nad Vltavou
- Oberlausitz Neugersdorf
- Oeste Sao Paulo
- Olympic Club (Women)
- Olimpico EC U20
- Olimpico EC Itabaianinha U20
- Operario FC MT
- Operario Varzea Grande U20
- Oceanside Dutch Lions (W)
- Oakland Soul SC (W)
- Ozarowianka OM
- Oakland Soul Women
- Olympia Warriors Hobart 2
- Oberndorfer SK
- Oh My God
- Olympic Brisbane W.
- Oikawa, Mizuki
- Opava (N)
- Olmecas De Tabasco
- Operario MS U20
- Olympia FC Warriors (Wom)
- Oeste FC SP
- Olimpija Ljubljana (N)
- Odd BK (W)