ClubLocationLeagueTierFounded
Newell's Old Boys Reserva—Torneo de Reserva - Primera División—1903
Nusle—Pražská II. Třída—1903
Olney Town—Dissolved 2018—1903
Orfeas Xanthis—Gamma Ethniki - Group 1—1903
Orkdal—Dissolved 1998—1903
Paulista-SC—Dissolved 1951—1903
Phönix Lübeck—Regionalliga Nord—1903Pirmasens—Oberliga Rheinland-Pfalz/Saar—1903Plauen—NOFV-Oberliga Süd—1903
Port Adelaide—NPL State League 1—1903RMSK Cidlina—Divize C—1903Racing Club—Primera División Argentina—1903Racing Club Reserva—Torneo de Reserva - Primera División—1903Radolfzell—Landesliga Südbaden—1903Rakovník—Přebor Středočeského Kraje—1903
Real Avilés—Primera Federación - Grupo 1—1903
Red Star Penzing—2. Landesliga - Wien—1903Rheinland Hamborn—Bezirksliga Niederrhein—1903SCR Hochstädt—Dissolved 1972—1903Sabadell—Primera Federación - Grupo 2—1903
Santiago Morning—Primera B de Chile—1903Sarpsborg FK—4. Divisjon - Østfold—1903Schwechat—Wiener Stadtliga—1903Selsey—Southern Combination League - Division One—1903Shelley Community—North West Counties League - Division One North—1903
Sleipner—Division 2 Södra Svealand—1903Solingen-Wald 03—Bezirksliga Solingen—1903Teplitzer FK—Dissolved 1940—1903
Torres—Serie C - Girone B—1903Tuna Luso—Campeonato Paraense - 1ª Divisão—1903