- Nail Salons, Jamestown
- National Government, Jamestown
- National Guard, Jamestown
- National Military, Jamestown
- Nephrologists, Jamestown - Kidney Doctors, Physicians & Surgeons (Nephrology)
- Neurologists, Jamestown - Neurology Doctors, Physicians & Surgeons
- News Service, Jamestown - News Syndicates
- Newspaper Manufacturers, Jamestown
- Night Clubs, Jamestown - Nightclub & Night Life
- Non Durable Goods & Products, Jamestown
- Non-Denominational Churches, Jamestown
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- Nonclay Refractories, Jamestown
- Noncommercial Social Research Organization, Jamestown
- Nonresidential Building Operators, Jamestown
- North American Restaurants, Jamestown
- Notary Public, Jamestown
- Nurse Certified Practitioners, Jamestown
- Nurseries & Garden Centers, Jamestown
- Nurseries - Plants & Trees, Jamestown - Greenhouses
- Nurses, Jamestown
- Nursing & Life Care Homes, Jamestown
- Nursing Homes, Jamestown - Skilled Nursing Facility - Personal Care Centers
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