 | J&J Construction (Parham), Antigua and Barbuda |
 | J.Malucelli (São José dos Pinhais), Brazil |
 | J.S. Fry & Sons, England |
 | Jabal Al Mukaber (Jerusalem), Palestine |
 | Jableh (Jableh), Syria |
 | Jablonec (Jablonec nad Nisou), Czech Republic |
 | JAC (Libreville), Gabon |
 | Jacksonville Tea Men (Jacksonville), USA |
| Jacuipense (Riachão do Jacuípe), Brazil |
 | Jagiellonia (Białystok), Poland |
 | Jagodina (Jagodina), Serbia |
 | Jaguares de Chiapas (Tuxtla Gutiérrez), Mexico |
 | Jaguares de Córdoba (Montería), Colombia |
 | Jalapa (Jalapa), Guatemala |
 | Jambyl (Taraz), Kazakhstan |
 | Jamhuri (Gombani), Zanzibar |
| Jamhuri (Zanzibar), Zanzibar |
 | Jamus, South Sudan |
 | Japan Actuel's (Analamanga), Madagascar |
| Jaraguá (Jaraguá), Brazil |
| Jardines, England |
| Jardines Nottingham (Nottingham), England |
 | Jaro (Jakobstad), Finland |
| Jarrow, England |
| Jarrow Blackett, England |
| Jarrow Caledonians, England |
| Jarrow Croft, England |
| Jarrow Roofing Boldon CA (Boldon Colliery), England |
| Jas Qyran (Almaty), Kazakhstan |
| Jas Sunkar (Astana), Kazakhstan |
 | Jasper United (Onitsha), Nigeria |
| Jastar (Oral), Kazakhstan |
 | Jaunība (Daugavpils), Latvia |
| Jaunība (Rīga), Latvia |
| Javor (Ivanjica), Serbia |
 | Javor (Ivanjica), Serbia and Montenegro |
| Jazz (Pori), Finland |
 | JC Abidjan (Abidjan), Côte d'Ivoire |
 | JCT (Phagwara), India |
 | Jeanne d'Arc (Le Port), Réunion |
 | Jedinstvo (Bihać), Bosnia and Herzegovina |
 | Jedinstvo (Bijelo Polje), Montenegro |
| Jedinstvo (Bijelo Polje), Serbia and Montenegro |
| Jedinstvo (Ub), Serbia |
 | JEF United Ichihara Chiba (Chiba), Japan |
 | Jeju United (Seogwipo), South Korea |
| Jelgava (Jelgava), Latvia |
| Jenis (Astana), Kazakhstan |
| Jeonbuk Hyundai Motors (Jeonju), South Korea |
| Jeonnam Dragons (Gwangyang), South Korea |
| Jersey Bulls (Saint Helier), England |
 | Jerv (Grimstad), Norway |
 | Jeshi (Zanzibar), Tanzania |
 | Jeunesse (Esch), Luxembourg |
| Jeunesse (Hautcharage), Luxembourg |
| Jeunesse Sportive (Libreville), Gabon |
 | Jezero (Medvode), Slovenia |
| Jezero (Plav), Montenegro |
 | JH Djazair (Alger), Algeria |
| Ji-Paraná Futebol Clube (Ji Paraná), Brazil |
 | Jiangsu Suning (Nanjing), China |
 | Jimma Aba Jifar (Jimma), Ethiopia |
| Jirama Antsirabe (Antananarivo), Madagascar |
 | Jiul (Petroşani), Romania |
| JJK (Jyväskylä), Finland |
| JKU SC (Zanzibar), Zanzibar |
 | Jocoro (Jocoro), El Salvador |
 | Joe Public (Tunapuna), Trinidad and Tobago |
| Johnson & Barnes, England |
 | Johor (Pasir Gudang), Malaysia |
| Johor Darul Ta'zim (Johor Bahru), Malaysia |
| Joinville (Joinville), Brazil |
| Jokerit (Helsinki), Finland |
 | Jomo Cosmos (Johannesburg), South Africa |
 | Jong Colombia (Boca Samí), Netherlands Antilles |
 | Jong Holland (Willemstad), Curaçao |
| Jong Holland (Willemstad), Netherlands Antilles |
 | Jönköpings Södra (Jönköping), Sweden |
 | Jonoob (Ahvaz), Iran |
 | Jorge Newbery (Junín), Argentina |
 | Jorge Wilstermann (Cochabamba), Bolivia |
| Jos Nosy-Bé (Hell-Ville), Madagascar |
 | JS du Ténéré (Niamey), Niger |
| JS Kabylie (Tizi-Ouzou), Algeria |
 | JS Kairouan (Kairouan), Tunisia |
 | JS Pobè (Pobè), Benin |
| JS Saint-Pierroise (Saint-Pierre), Réunion |
 | JS Talangaï (Brazzaville), Congo |
 | JSK (Skopje), Bulgaria |
| JSK (Varna), Bulgaria |
| JSK-Botev (Pleven), Bulgaria |
| JSM Bejaia (Béjaïa), Algeria |
 | Juan Aurich (Chiclayo), Peru |
| Juárez (Ciudad Juárez), Mexico |
| Juazeirense (Juazeiro), Brazil |
| Juazeiro Social Clube (Juazeiro), Brazil |
| Júbilo Iwata (Iwata), Japan |
 | Jülich (Kreis Düren), FRG |
| Julius Berger (Lagos), Nigeria |
| Jump Home Guard, England |
| Jump WMC, England |
| Junior (Barranquilla), Colombia |
 | Junior Professional (Monrovia), Liberia |
 | Junior Stars (Sandy Ground), St. Martin |
| Jurgens (Purfleet), England |
| Jūrmala (Jūrmala), Latvia |
| Jūrnieks (Rīga), Latvia |
| Jutrzenka (Kraków), Poland |
 | Juvenes/Dogana (Serravalle), San Marino |
 | Juvenil Reyes, Equatorial Guinea |
 | Juventud (Las Piedras), Uruguay |
| Juventud (San Luis), Argentina |
| Juventud Alianza (Santa Lucía), Argentina |
| Juventud Antoniana (Salta), Argentina |
| Juventud Olímpica (Sonsonate), El Salvador |
| Juventud Retalteca (Retalhuleu), Guatemala |
| Juventude (Caxias do Sul), Brazil |
| Juventude (São Mateus do Maranhão), Brazil |
 | Juventus (Managua), Nicaragua |
 | Juventus (Orange Walk Town), Belize |
| Juventus (Sandy Ground), St. Martin |
| Juventus (São Paulo), Brazil |
 | Juventus (Turin), Italy |
| Juventus Kralendijk (Kralendijk), Netherlands Antilles |
 | Juventus Saint-Anne (Saint-Anne), Guadeloupe |
| JV Lideral Futebol Clube (Imperatriz), Brazil |
 | Jwaneng Galaxy (Jwaneng), Botswana |
