- Insurance Services Inc
- Interior Fashions Inc
- Interiors By Woleslagle
- Investment Center
- Iovino Tub Pool & Spa
- IRIS Assoc
- Iron City Medical Physics Inc
- Irwin Bank & Trust Co
- Irwin Bank & Trust Co
- Irwin Bank & Trust Co
- Irwin Builders Supply
- Irwin Car & Equipment Inc
- Irwin Concrete Co
- Irwin Country Club
- Irwin Distributing Co
- Irwin Family Care
- Irwin Family Chiropractic Clnc
- Irwin Garbage & Sewage
- Irwin Heating & Air Cond Inc
- Irwin Holiday Inn Express
- Irwin Hotel
- Irwin Manor
- Irwin Mayor's Office
- Irwin Monument Co
- Irwin News
- Irwin Photo Lab
- Irwin Plaza Beer
- Irwin Police Dept
- Irwin Public Works Dept
- Irwin Real Estate Tax Cllctr
- Irwin Sunoco
- Irwin Union Cemetery
- Irwin Volunteer Fire Dept Ofc
- Isaly's Bakery Dairy & Deli
- Italian Miners Soc
- Italian Village Pizza
- J & J Custom Cycles
- J C Auto Trim & Upholstery
- J C Auto Truck Svc
