| IDUNSA | Peruvian Segunda División | — | 2003 | Arequipa Stadium |
| Inclán Sport Club | Copa Perú | — | — | — |
| Independiente de Cañete | Copa Perú | — | — | — |
| Indiana Pacers | National Basketball Association | Indianapolis | 1967 | Gainbridge Fieldhouse, Corteva Coliseum, Market Square Arena |
| Indianapolis Colts | National Football League | Indianapolis | 1953 | Memorial Stadium, Lucas Oil Stadium, RCA Dome |
| Indianapolis Olympians | National Basketball Association | Indianapolis | 1949 | Hinkle Fieldhouse |
| Inter Miami CF | Major League Soccer | Miami | January 29, 2018 | Chase Stadium |
| International Marine Incorporated F.C. | Copa Perú | — | 1992 | Estadio Campeonísimo |
| Ivrea Basket Team | — | Ivrea | — | — |