ClubLocationLeagueTierFounded
Rajpracha—Thai League 2—1966
Ramsbottom United—North West Counties League - Premier Division—1966
Real de Banjul—GFA League First Division—1966
Rebordosa—Campeonato de Portugal - Série B—1966
Rot-Weiß Erfurt—Regionalliga Nordost—1966
Roteña—Primera Andaluza - Cádiz—1966Saltdean United—Southern Combination League - Premier Division—1966San Cristóbal de los Ángeles—Segunda Regional de Madrid—1966
San Diego Toros—Dissolved in 1968—1966San Roque—Segunda Andaluza - Cádiz—1966
Santa Veneranda—Prima Categoria Marche—1966
Shabab Al-Sahel—Lebanese Premier League—1966
Sharjah—UAE Pro-League—1966
Solli Plyus——1966Spinea—Eccellenza Veneto—1966St. Louis Stars—Dissolved in 1977—1966
Straden—Unterliga Süd - Steiermark—1966Tamaraceite—Tercera Federación - Grupo 12—1966
Três Passos—Inactive—1966
Tuggen—1. Liga - Groupe 3—1966Tuggen II—4. Liga - FVRZ—1966UC Santa Barbara Gauchos—NCAA Division I—1966Union Berlin—Bundesliga—1966Union Berlin II—Dissolved in 2015—1966União Leiria—Liga Portugal 2—1966
Upper Annandale—SoSFL—1966Vasco da Gama Sines—AF Setúbal - 1ª Divisão—1966Venafro—Eccellenza Molise—1966Vila-Seca—Segona Catalana—1966Villasimius—Promozione Sardegna—1966