| IDUNSA | Segunda División (Campeonato Peruano de Futebol) | — | 2003 | Estádio Arequipa |
| 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 | — | — |