| Inclán Sport Club | Copa Perú | — | — | — |
| 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 |
| Institución Deportiva Colegio Nacional de Iquitos | Copa Perú | — | 1926 | Estadio Max Augustín |
| Inter de Miami | Major League Soccer | Miami | 29 de enero de 2018 | Chase Stadium |
| International Marine Incorporated Fútbol Club | Copa Perú | — | 1992 | Estadio Campeonísimo |
| Ivrea Basket Team | — | Ivrea | — | — |