ClubLocationLeagueTierFounded
Buriram United—Thai League 1—1970
Busan IPark—K League 2—1938
CA Bizertin—Tunisian Ligue Professionnelle 1—1928
CR Belouizdad—Algerian Ligue Professionnelle 1—1955CS Sfaxien—Tunisian Ligue Professionnelle 1—1928
Cardiff Metropolitan University—Cymru Premier—2000Carmarthen Town—Cymru South—1950Cefn Druids—North East Wales Football League - Championship—1872
Celtic—Scottish Premiership—1887
Ceramica Cleopatra—Egyptian Premier League—2007
Cerezo Osaka—J1 League—1993Chiangrai United—Thai League 1—2009
Cliftonville—NIFL Premiership—1879Coleraine—NIFL Premiership—1927Connah's Quay Nomads—Cymru Premier—1946Crusaders—NIFL Premiership—1898
Côte d'Or—Seychelles Premier League—UNK
DPMM—Liga Super Malaysia—1994
Dhofar—Oman Professional League—1968Dundee—Scottish Premiership—1893Dundee United—Scottish Premiership—1909Dungannon Swifts—NIFL Premiership—1949East Fife—Scottish League One—1903
FC Jurong—Singapore Premier League—2004FC Seoul—K League 1—1983FC Tokyo—J1 League—1998
FC Zürich—Swiss Super League—1896
FH—Úrvalsdeild Karla—1939
FK Etar Veliko Tarnovo—Dissolved 2003—1924Fanja—Oman First Division—1970