- Accounting, Auditing & Bookkeeping Services, New Fairfield
- Additional Educational Opportunities, New Fairfield
- Advertising Agencies, New Fairfield
- Advertising, PR & Marketing Services, New Fairfield
- Agriculture, New Fairfield
- Airport, New Fairfield
- Airport Parking, New Fairfield
- Airport Transportation Services, New Fairfield
- Alarm Services, New Fairfield
- Animal Hospitals, New Fairfield - Veterinary Clinic & Hospital
- Animal Shelters & Protection Agencies, New Fairfield
- Appliance Repair & Service, New Fairfield
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- Art Galleries & Dealers, New Fairfield
- Arts & Culture, New Fairfield
- Asian Restaurants, New Fairfield
- Athletic Facilities & Services, New Fairfield
- Attorneys & Lawyers, New Fairfield
- Attorneys & Lawyers, New Fairfield
- Auto & Truck Bodies & Equipment, New Fairfield
- Auto Body Repair & Paint Shop, New Fairfield - Auto Body Shop
- Auto Parts, Accessories, Equipment & Supplies, New Fairfield
- Auto Repair Shops & Maintenance Service, New Fairfield - Auto Mechanic & Car Repair Shops
- Auto Services, New Fairfield
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