Kamuya açık kayıtlarda ve müsabaka sonuçlarında bulduğumuz kulüpler. Şehre, bölgeye ya da lige göre ara.
Oakley United F.C.
Oakwood F.C.Southern Combination Football League
Odd Down F.C.Western Football League
Okehampton Argyle F.C.Okehampton
Old Aloysians F.C.
Old Bradwell United F.C.Spartan South Midlands Football League
Old Brightonians F.C.
Old Carthusians Football ClubSurrey · Arthurian League · 1 saha
Old Castle Swifts F.C.
Old Esthameians F.C.
Old Etonians Football ClubEton · Arthurian League
Old Foresters F.C.
Old Harrovian Association Football Club
Old Hill Wanderers F.C.
Old Madrid FCRoad Town · championnat des îles Vierges britanniques de football
Old Malvernians F.C.Cobham · Arthurian League · 2 saha
Old St Mark's F.C.
Old Westminsters FCArthurian League
Old Woodstock Town F.C.Hellenic Football League
Old Wykehamists F.C.
Oldbury Athletic F.C.
Oldbury United F.C.Midland Football Alliance
Oldham Athletic AFCOldham · championnat d'Angleterre de football de quatrième division · 2 saha
Oldham Boro F.C.North West Counties Football League
Oldland Abbotonians F.C.Western Football League
Oldpark F.C.Belfast · championnat d'Irlande du Nord de football
Ollerton Colliery F.C.
Ollerton Town F.C.Central Midlands Football League
Olney Town football clubUnited Counties League
Olympic F.C.
Omagh Town Football and Athletic ClubOmagh · championnat d'Irlande du Nord de football
Omagh United F.C.
Onchan A.F.C.championnat de l'île de Man de football
One Love United FCRoad Town · championnat des îles Vierges britanniques de football
Orangefield Old Boys F.C.
Orangefield Old Boys' Association F.C.Northern Amateur Football League
Orion Football ClubAberdeen · Northern Football League
Orkney F.C.Orcades
Ormiston F.C.
Orpington F.C.Kent Invicta Football League