- Iowa State Of
- iParty
- Ipc International
- IPS
- Ireland Bank
- Ireland Cleaners
- Irene's Beauty Salon
- Irene's Beauty Shop
- IRIS
- Irish Cottage
- Irish Pub
- Irish Shop
- Irma's Beauty Salon
- Iron Age Footwear Center
- Iron Horse
- Iron Horse Saloon
- Iron Mountain
- Iron Skillet
- Iron Skillet Restaurant
- Iron Works
- Ironwood Golf Course
- Irresistibles
- IRS Office
- Irving Oil
- Irving Oil Corporation
- Irwin Mortgage
- Irwin Mortgage Corporation
- Isaac's Restaurant & Deli
- Isabel's Beauty Salon
- ISG Resources
- Isis
- Islamic Center
- Island Auto Sales
- Island Cafe
- Island Carousel
- Island Chiropractic
- Island Cleaners
- Island Food Stores
- Island Graphics