| Inclán Sport Club | Copa Peru | — | — | — |
| Independiente de Cañete | Copa Peru | — | — | — |
| Indiana Pacers | National Basketball Association | Indianápolis | 1967 | Gainbridge Fieldhouse, Corteva Coliseum, Market Square Arena |
| Indianapolis Colts | National Football League | Indianápolis | 1953 | Memorial Stadium, Lucas Oil Stadium, RCA Dome |
| Indianapolis Olympians | National Basketball Association | Indianápolis | 1949 | Hinkle Fieldhouse |
| International Marine Incorporated F.C. | Copa Peru | — | 1992 | Estadio Campeonísimo |
| Ivrea Basket Team | — | Ivrea | — | — |
| Jacksonville Jaguars | National Football League | — | 1995 | TIAA Bank Field |
| JesoloSandonà Basket | — | Jesolo | — | — |
| Jorge Chávez | — | — | — | Estadio Telmo Carbajo |
| Jorge Chávez No. 1 | — | — | 1910 | Estadio Nacional del Perú (1897) |
| José Carlos Mariategui | Copa Peru | — | 16 de julho de 1975 | Estadio Nacional del Perú (1897) |
| José Gálvez FBC | Campeonato Peruano de Futebol | — | 1951 | Estadio Manuel Rivera Sanchez |
| José María Arguedas de Andahuaylas | Copa Peru | — | 2004 | Estadio Los Chankas |
| José Pardo de Tumán | Copa Peru | — | 1919 | — |
| Juan Aurich | — | — | 1922 | Estádio Elías Aguirre |
| Junior Casale Monferrato | — | Casale Monferrato | 1956 | — |
| Juvecaserta Basket | Liga Italiana de Basquetebol, Serie B | Castel Morrone | 1951 | PalaMaggiò |
| Juvenil Andino | Copa Peru | — | 11 de agosto de 1932 | — |
| Juvenil Los Ángeles | Copa Peru | — | 1958 | — |
| Juventud Barranco | Copa Peru | — | 26 de janeiro de 1963 | Estadio Segundo Aranda Torres |
| Juventud La Joya | Copa Peru | — | — | Estadio Rómulo Shaw Cisneros |
| Juventud Progreso | Copa Peru | — | — | — |
| Juventud Ticlacayán | Copa Peru | — | 2011 | Estadio Daniel Alcides Carrión |
| Juventus Basket Pontedera | — | — | — | — |
| Juventus Corazón | Copa Peru | — | — | — |
| Juvi Cremona Basket | — | — | — | — |
| Kansas City Chiefs | National Football League | Kansas City, Dallas | 1960 | Cotton Bowl, Kansas City Municipal Stadium, Arrowhead Stadium |
| Kansas City Royals | Major League Baseball | — | 1969 | Kauffman Stadium |
| La Loretana | Copa Peru | — | maio 1971 | Estadio Aliardo Soria Pérez |
| La Peña Sporting | Copa Peru | — | 6 de abril de 1968 | — |
| Las Vegas Raiders | National Football League | Las Vegas | 1960 | Los Angeles Memorial Coliseum, O.co Coliseum, Allegiant Stadium |
| Latina Basket | — | Latina | 1968 | — |
| Lawn Tennis de la Exposición (fútbol) | Copa Peru | — | 27 de junho de 1884 | Estádio Nacional do Peru |
| Lawn Tennis F.C. | Copa Peru | — | 1995 | Estádio Nacional do Peru |
| Legnano Knights | — | Legnano | 1966 | — |
| León de Huánuco | Segunda División (Campeonato Peruano de Futebol) | — | 1946 | Estadio Heraclio Tapia |
| Libertas Basket Bologna | — | Bolonha | — | — |
| Libertas Liburnia Basket Livorno | — | Livorno | — | — |
| Libertas Livorno | — | Livorno | 1 de novembro de 1947 | — |
| Libertas Pallacanestro Asti | — | — | 1954 | — |
| Libertas Pallacanestro Livorno | — | Livorno | 1991 | — |
| Lima Cricket and Football Club | Copa Peru | — | 1859 | — |
| Lions Basket | — | — | — | — |
| Los Angeles Angels | Major League Baseball | — | 1960 | Angel Stadium |
| Los Angeles Chargers | National Football League | Los Angeles | 1960 | SoFi Stadium, Dignity Health Sports Park, Qualcomm Stadium, Los Angeles Memorial Coliseum, Balboa Stadium |
| Los Angeles Clippers | National Basketball Association | Los Angeles | 1970 | Maple Leaf Gardens, Buffalo Memorial Auditorium, Los Angeles Memorial Sports Arena, Pechanga Arena, Crypto.com Arena |
| Los Angeles Dodgers | Major League Baseball | Los Angeles | 1884 | Dodger Stadium |