Businesses beginning with O
- O'Callahans Restaurant
- O'Connor Painting, LLC
- Oasis Auto, Inc.
- Oasis Contractors, Inc.
- Oasis Interactive, LLC
- Ogata Construction Company
- Oil Can Henry's
- Oil4Charity, LLC dba eoilchange.com
- Old Boise, LLC
- Omni Security Systems, Inc
- Omnipure Filter Company, Inc.
- One Hour Heating & Air Conditioning
- One Small Child
- One World Medical Relief
- Ontario Bridal & Tuxedo
- Ontario Chamber of Commerce
- Ontario Floor Covering
- Open Lines Inc.
- Optimizon
- OPTIONS
- Orchards Naturopathic Center
- Organic Solutions! Inc.
- Orkin Idaho
- Orkin Pest Control
- Osmus Roofing
- Overhead Door Co of SW Idaho
- Overhead Door Company of SW Idaho
- Overhead Door Company of Twin Falls
- Overhead Door Inc.
- Owyhee Construction
- Owyhee Sheet Metal & Hardware
- Oxarc Fire Equipment
- Oxarc, Inc.
- Oxi Fresh of Idaho