| Osa Heating & Cooling - Heating Contractor |
| Old Harbor Outfitters - Fishing Tackle |
| ONE STOP INSURANCE - Insurance Agents & Brokers |
| O&G Industries Inc - Wholesale Scrap Materials |
| Oprions Cleaning Svc - Building Maintenance |
| Otis Elevator - Elevator Installers |
| One Touch Systems LLC - Home Theater Store |
| Oral Surgery Associates Llc - Dentists-Oral & Maxillofacial Surgery |
| Optimum - Internet Service Provider |
| Olivier Kpognon Photography - Photographers-Commercial |
| Optimum WiFi Hotspot - Internet Service Provider |
| Optimum WiFi Hotspot - Internet Service Provider |
| Optimum WiFi Hotspot - Internet Service Provider |
| Optimum WiFi Hotspot - Internet Service Provider |
| Optimum WiFi Hotspot - Internet Service Provider |
| Optimum WiFi Hotspot - Internet Service Provider |
| Optimum WiFi Hotspot - Internet Service Provider |
| Optimum WiFi Hotspot - Internet Service Provider |
| Optimum WiFi Hotspot - Internet Service Provider |
| Of Bridgeport Locksmith - Locksmith |
| Of Bridgeport Locksmith - Locksmith |
| O & A Remodeling, LLC - Bathroom Remodeler |
| Optimum Energy LLC - Heating Contractor |
| Overhead Door Corp - Doors - Garage |
| Owens-Illinois - Aerosols (Manufacturers) |
| Oxford Health Plans - Health - Services |
| Outboard Electric Corp - Engines - Marine |
| O & G Industries Inc - General Contractor |
| O'Brien Litho Corp - Printers |
| Ob-Gyn Specialty - Services |
| Old Timers Club - Club |
| O & F Painting Contractors - Painter |
| Oakwood Apartments - Apartment Building |
| Oasis Market - Deli |
| Olivia's Home Healthcare Inc - Health - Services |
| Omanel Restaurant - Restaurant |
| One Link Llc - Cellular Telephones (Services) |
| Omis Pizza - Pizza Restaurant |
| Ob-Gyn Specialty - Services |
| Olympus Corp - Construction - Building Contractors |
| On Line Press - Printers |
| Oil Express - Services |
| Old Mill Green Library - Libraries - Public |
| Olivet Congregational Church - Churches |
| Omes Pizza - Pizza Restaurant |
| Old San Juan Cafe - Cafe |
| Old Marina Pizza Plus - Pizza Restaurant |
| Online Systems - Computers - Networking |
| One Hundred Fairfield Assn - Services |
| One Stop Variety - Convenience Store |
| One Stop Barber Shop - Barber Shop |
| Operation Hope Of Fairfield - Services |
| Ophthalmic Surgeons Of Greater Bridgeport PC - Ophthalmologist |
| Oriental Supermarket - Grocers - Retail |
| Origin Communications-Ct Inc - Nonclassifiable Establishments |
| Oronoque Painting & Remodeling - Painter |
| One Step Ahead Child Care - Child Care Service |
| One Stop Travel - Services |
| Open Arms Outreach Ministries - Religious Organization |
| One Kid - Services |
| Oms Inc - Real Estate - Management |
| Optimal Inc - Nonclassifiable Establishments |
| Oriental Health Spa - Services |
| Oral Surgery Assocs - Dentist |
| One Stop Deli - Deli |
| Osteoporosis Center - Services |
| One Stop News & Variety - Variety Store |
| Options - Boutique Items - Retail |
| Orbit Marine Sports Ctr - Kites - Retail |
| Our Lady Of Fatima Day Care - Child Care Service |
| Our Lady Of Good Counsel Chr - Churches |
| Oronoque Painting & Remodeling - Painter |
| Our Lady Of Fatima Church - Churches |
| Osaka Oriental Spa - Massage Therapist |
| Osi Inc - Nonclassifiable Establishments |
| Othniel Group Llc - Services - Web Design |
| Our Lady Of Fatima Catholic - Churches |
| Our Plumber - Plumbing - Contractors |
| Ortiz Market - Convenience Store |
| Otto's Ii Barber Shop & Salon - Beauty Salon |