| Real Garcilaso | Peruvian Primera División | — | 2009 | Estadio Garcilaso |
| Real Salt Lake | Liga Utama Sepak Bola Amerika Serikat | Salt Lake City | 2005 | Stadion Rio Tinto |
| Regatas Lima | Copa Perú | — | — | — |
| Reyer Venezia Mestre | Lega Basket Serie A | Venesia | 1925 | Palasport Taliercio |
| Reyer Venezia Mestre Femminile | — | Venesia | 1925 | — |
| Rinascita Basket Rimini | Serie A2 Basket | Rimini | 1947 | Palasport Flaminio |
| Riva del Garda Basket | — | Riva del Garda | — | — |
| Robur et Fides Varese | — | Varese | — | — |
| Roseto Sharks | — | Roseto degli Abruzzi | 1946 | — |
| S.S. Felice Scandone | Serie B Dilettanti | Avellino | 1948 | Palasport Giacomo Del Mauro |
| Sacramento Kings | National Basketball Association | Sacramento | 1945 | ARCO Arena I, ARCO Arena, Golden 1 Center, Municipal Auditorium, Hy-Vee Arena, Omaha Civic Auditorium, Cincinnati Gardens, Edgerton Park Arena, Blue Cross Arena |
| Saetas de Oro | Copa Perú | — | — | — |
| Salerno Basket 92 | — | — | — | — |
| San Antonio Spurs | National Basketball Association | — | 1967 | Alamodome, Kay Bailey Hutchison Convention Center, HemisFair Arena, Fort Worth Convention Center, Frost Bank Center, Moody Coliseum, Lubbock Municipal Coliseum |
| San Diego FC | Liga Utama Sepak Bola Amerika Serikat | San Diego | 18 Mei 2023 | Stadion Snapdragon |
| San Diego Padres | Major League Baseball | San Diego | 1969 | Petco Park |
| San Francisco 49ers | Liga Nasional Sepak bola Amerika | — | 1946 | Stadion Levi's |
| San Francisco de Asís de Lonya Grande | Copa Perú | — | 1946 | — |
| San Francisco Giants | Major League Baseball | San Francisco | 1883 | Oracle Park |
| San Jose Earthquakes | Liga Utama Sepak Bola Amerika Serikat | San Jose | 1995 | Stadion Avaya, Stadion Buck Shaw |
| San Jose Sharks | — | — | 1991 | Cow Palace, SAP Center |
| San Lorenzo de Almagro de Chiclayo | Copa Perú | — | — | Estadio Elías Aguirre |
| San Martino di Lupari | — | — | — | — |
| San Simón de Moquegua | Peruvian Primera División | — | 1983 | Estadio 25 de Noviembre |
| Santiago Barranco | Copa Perú | — | 20 September 1929 | — |
| Santos de Nasca | Copa Perú | — | — | Estadio José Picasso Peratta |
| Scafati Basket | Lega Basket Serie A | Scafati | 1969 | PalaMangano |
| Scaligera Basket Verona | Lega Basket Serie A | Verona | 1951 | PalaOlimpia |
| Seattle Kraken | — | — | 2021 | Climate Pledge Arena |
| Seattle Mariners | Major League Baseball | — | 1977 | Kingdome, Safeco Field |
| Seattle Metropolitans | Pacific Coast Hockey League | Seattle | 1915 | — |
| Seattle Seahawks | Liga Nasional Sepak bola Amerika | — | 1976 | Kingdome, Husky Stadium, Stadion Lumen Field |
| Seattle Sounders FC | Liga Utama Sepak Bola Amerika Serikat | Seattle | 2009 | Stadion Lumen Field |
| Seattle SuperSonics | — | Washington | 1967 | Kingdome, Climate Pledge Arena, Tacoma Dome |
| Sebastiani Basket Club Rieti | — | — | — | — |
| Senati FBC | Copa Perú | — | — | Estadio Mariano Melgar |
| Serrato Pacasmayo | Peruvian Segunda División | — | 2012 | Estadio Carlos A. Olivares |
| Sheboygan Redskins | National Basketball Association | Sheboygan | 1938 | Playdium, Sheboygan Municipal Auditorium and Armory |
| Sisv Viterbo | — | Viterbo | — | — |
| Societa Veroli Basket | — | Frosinone | 1968 | — |
| Società Cestistica Mazzini | — | Bologna | — | — |
| Società Ginnastica Triestina | — | Trieste | 1930 | — |
| Sport Boys | Torneo Descentralizado | — | 1927 | Estadio Miguel Grau |
| Sport Chorrillos | Copa Perú | — | — | Estadio Campeones del 36 |
| Sport Coopsol | Peruvian Segunda División | — | 2000 | Estadio Municipal de Chorrillos |
| Sport Dos de Mayo | Copa Perú | — | — | Union Tarma Stadium |
| Sport Huamanga | Copa Perú | — | 2002 | Estadio Ciudad de Cumaná |
| Sport Huancayo | Peruvian Primera División | — | 2008 | Estadio Huancayo |