- Nail Salons, Springfield
- National Government, Springfield
- Natural Stone, Springfield - Suppliers & Wholesalers
- Naturopathic Doctors, Springfield - Naturopathic Medicine Physicians
- Needlework & Needlework Supplies & Materials, Springfield
- Negligence Attorneys & Lawyers, Springfield
- Negligence Attorneys & Lawyers, Springfield
- Negligence Lawyers & Attorneys, Springfield
- Nephrologists, Springfield - Kidney Doctors, Physicians & Surgeons (Nephrology)
- Network Designers, Springfield - Computer Networking Design & Systems
- Neurologists, Springfield - Neurology Doctors, Physicians & Surgeons
- New Jerusalem Church, Springfield
- News Service, Springfield - News Syndicates
- Newspaper Manufacturers, Springfield
- Night Clubs, Springfield - Nightclub & Night Life
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- Non Durable Goods & Products, Springfield
- Noncommercial Research Organizations, Springfield
- Noncommercial Social Research Organization, Springfield
- Nonferrous Die-Casting Except Aluminum, Springfield
- Nonferrous Metal Services, Springfield
- Nonresidential Building Operators, Springfield
- North American Restaurants, Springfield
- Notary Public, Springfield
- Nurseries & Garden Centers, Springfield
- Nurses, Springfield
- Nurses Registered, Springfield
- Nursing & Life Care Homes, Springfield
- Nursing Homes, Springfield - Skilled Nursing Facility - Personal Care Centers
- Nutrition Centers, Springfield - Nutrition Specialists
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