| S.S. Basket Napoli | — | Naples | 1946 | PalaBarbuto |
| Saetas de Oro | Copa Perú | — | — | — |
| 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 | Major League Soccer | San Diego | 18 May 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 Perú | — | 1946 | — |
| San Francisco Giants | Major League Baseball | San Francisco | 1883 | Oracle Park |
| San Jose Earthquakes | Major League Soccer | San Jose | 1995 | PayPal Park, Stevens Stadium |
| San Jose Sharks | — | — | 1991 | Cow Palace, SAP Center |
| San Lorenzo de Almagro de Chiclayo | Copa Perú | — | — | Estadio Elías Aguirre |
| San Martino di Lupari | — | — | — | — |
| San Martín de Porres de Pucallpa | Copa Perú | — | 9 April 1964 | Estadio Aliardo Soria Pérez |
| 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 | Serie A | Scafati | 1969 | PalaMangano |
| 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 FC | Major League Soccer | Seattle | 2009 | 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 | — |
| Spider Fabriano | — | — | — | — |
| Sport Boys | Torneo Descentralizado | — | 1927 | Estadio Miguel Grau |
| Sport Chorrillos | Copa Perú | — | — | Estadio Campeones del 36 |
| Sport Club Alcamo | — | Alcamo | — | — |
| 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 |
| Sport Inca | — | — | 18 May 1908 | Estadio Nacional del Perú (1897) |
| Sport José Gálvez | — | — | 1902 | Estadio Nacional del Perú (1897) |
| Sport Juan Bielovucic | — | — | — | Estadio Nacional del Perú (1897) |
| Sport Pilsen Callao | Copa Perú | — | 1924 | — |
| Sport Rosario | Peruvian Primera División | — | 1965 | Estadio Rosas Pampa |
| Sport Sáenz Peña | — | — | 1906 | Estadio Telmo Carbajo |
| Sport Vallejo | Copa Perú | — | October 2002 | Estadio Mansiche |
| Sport Victoria | Copa Perú | — | 1916 | Estadio José Picasso Peratta |
| Sport Águila | Peruvian Segunda División | — | 25 December 1947 | — |
| Sport Áncash | Peruvian Segunda División | — | 1967 | Estadio Rosas Pampa |
| Sporting Bellavista | — | — | 1912 | Estadio Nacional del Perú (1897) |
| Sporting Club Gira | — | Bologna, Ozzano dell'Emilia | 1945 | — |
| Sporting Kansas City | Major League Soccer | Kansas City | 1995 | Sporting Park, Legends Field, Arrowhead Stadium |
| Sporting Pizarro | Copa Perú | — | — | Estadio Mariscal Cáceres |
| Sporting Tabaco (1926–1955) | Peruvian Primera División | — | 16 November 1926 | National Stadium of Peru |
| Sportivo Melgar | — | — | 14 July 1925 | Estadio Nacional del Perú (1897) |
| Sportivo Tarapacá Ferrocarril | — | — | 15 October 1911 | National Stadium of Peru |
| Sports Association Club Alianza Atlético de Sullana | Peruvian Segunda División | — | 1920 | Estadio Campeones del 36 |
| SSD Santa Lucia Sport | — | Rome | 1978 | — |
| St. Louis Blues | — | — | 1967 | Enterprise Center |
| St. Louis Cardinals | Major League Baseball | — | 1882 | Busch Stadium |
| St. Louis City SC | Major League Soccer | St. Louis | 20 August 2019 | Energizer Park |
| St. Louis Hawks | National Basketball Association | — | — | — |
| Starlight Valmadrera | — | — | — | — |
| Sutor Basket Montegranaro | — | Montegranaro | 1947 | Banca Marche Palace |