- Ideas Unlimited
- Idle Hour
- If It's Paper
- If the Shoe Fits
- IFA Country Stores
- IFCO Systems
- IGA
- IGA Supermarkets
- Iglesia Apostolica
- Iglesia de Cristo
- Iglesia de DIOS Pentecostal
- Iglesia Del DIOS Vivo
- Iglesia LA Luz Del Mundo
- Iglesia Nueva Vida
- IHC Health Center
- IHOP
- IHOP Restaurant
- III FORKS
- IJL Wachovia
- Ikea
- IKON
- Il Fornaio
- IL Forno
- Illegal Petes
- Illiana Surgery & Medical Center
- Illini Cash Advance
- Illinois Brick
- Illinois Central Railroad
- Illustrated Properties
- Image Beauty Salon
- Image Communications
- Image Concepts
- Image Express
- Image Factory
- Image Gallery
- Image Graphics
- Image Group
- Image Masters
- Image Nails