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- Andre Iguodala, swingman for the Philadelphia 76ers
- Robert G. Ingersoll, Illinois Attorney General, orator, social reformer
- Samuel Insull, businessman and industrialist
- Jim Irsay, owner of the Indianapolis Colts
- Tom Irwin, actor, Saving Grace, My So-Called Life, Related
- Burl Ives, actor and folk musician
Read more about this topic: List Of People From Illinois