| Polisportiva Cervia Milano Marittima | — | — | — | — |
| Polisportiva Dinamo | — | — | — | — |
| Polisportiva Folgore Nocera | — | — | — | — |
| Portland Timbers | Major League Soccer | Portland | 2009 | Providence Park |
| Portland Trail Blazers | National Basketball Association | Portland | 1970 | Veterans Memorial Coliseum, Moda Center |
| Porvenir Miraflores | Copa Peru | — | 29 de maio de 1922 | Estádio Nacional do Peru |
| Potenza 84 | — | Potenza | — | — |
| Progresso Castel Maggiore | — | Castel Maggiore | — | — |
| Quebec Bulldogs | — | — | 1888 | Quebec Skating Rink |
| Racing de Huamachuco | Copa Peru | — | 1946 | — |
| Raggisolaris Faenza | — | Faença | — | — |
| RB Montecatini Terme | — | Montecatini Terme | 1949 | PalaTerme |
| Real Salt Lake | Major League Soccer | Salt Lake City | 2005 | Rio Tinto Stadium |
| Real Sebastiani Rieti | Serie A2 | Rieti | 2020 | — |
| Red Bull New York | Major League Soccer | Harrison | 1995 | Giants Stadium, Red Bull Arena |
| Rinascita Basket Rimini | Serie A2 | Rimini | 1947 | Palasport Flaminio |
| Riviera Vado Basket | — | — | — | — |
| Robur et Fides Varese | — | Varese | — | — |
| Roseto Sharks | — | Roseto degli Abruzzi | 1946 | — |
| Rovereto Basket | — | Rovereto | — | — |
| Ruvo di Puglia Basket | — | — | — | — |
| 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 Peru | — | — | — |
| 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 Football Club | Major League Soccer | San Diego | 18 de maio de 2023 | Snapdragon Stadium |
| San Diego Padres | Major League Baseball | San Diego | 1969 | PETCO Park |
| San Francisco 49ers | National Football League | — | 1946 | Levi's Stadium |
| San Francisco de Asís de Lonya Grande | Copa Peru | — | 1946 | — |
| San Francisco Giants | Major League Baseball | São Francisco | 1883 | Oracle Park |
| San Jose Sharks | — | — | 1991 | Cow Palace, SAP Center |
| San José Earthquakes | Major League Soccer | São José | 1995 | Avaya Stadium, Buck Shaw Stadium |
| San Lorenzo de Almagro de Chiclayo | Copa Peru | — | — | Estádio Elías Aguirre |
| San Martino di Lupari | — | — | — | — |
| San Martín de Porres de Pucallpa | Copa Peru | — | 9 de abril de 1964 | Estadio Aliardo Soria Pérez |
| San Simón de Moquegua | Campeonato Peruano de Futebol | — | 1983 | Estádio 25 de Novembro |
| Santa Marinella Basket | — | — | — | — |
| Santiago Barranco | Copa Peru | — | 20 de setembro de 1929 | — |
| Santos FC (Peru) | Copa Peru | — | — | Estadio José Picasso Peratta |
| Scafati Basket | Liga Italiana de Basquetebol | Scafati | 1969 | PalaMangano |
| Scaligera Basket Verona | Liga Italiana de Basquetebol | Verona | 1951 | PalaOlimpia |
| Seattle Kraken | — | — | 2021 | Climate Pledge Arena |
| Seattle Mariners | Major League Baseball | — | 1977 | Kingdome, T-Mobile Park |
| Seattle Metropolitans | Pacific Coast Hockey League | Seattle | 1915 | — |
| Seattle Seahawks | National Football League | — | 1976 | Kingdome, Husky Stadium, Lumen Field |
| Seattle Sounders Football Club | Major League Soccer | Seattle | 2009 | Lumen Field |
| Seattle SuperSonics | — | Washington | 1967 | Kingdome, Climate Pledge Arena, Tacoma Dome |
| Sebastiani Basket Club Rieti | — | — | — | — |