- Nail Salons, Alexandria
- National Commercial Banks, Alexandria
- National Government, Alexandria
- National Guard, Alexandria
- National Military, Alexandria
- National Security, Alexandria
- Native American Agencies, Alexandria
- Naval Architect, Alexandria
- Needlework & Needlework Supplies & Materials, Alexandria
- Negligence Attorneys & Lawyers, Alexandria
- Network Communications, Alexandria
- Neurologists, Alexandria - Neurology Doctors, Physicians & Surgeons
- News Service, Alexandria - News Syndicates
- Newsletter Publishers, Alexandria
- Newspaper Manufacturers, Alexandria
- Newspaper Publishing & Printing, Alexandria
- Newspaper Television & Radio Professionals, Alexandria
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- Newspapers, Alexandria
- Non Durable Goods & Products, Alexandria
- Non-Denominational Churches, Alexandria
- Noncommercial Research Organizations, Alexandria
- Noncommercial Social Research Organization, Alexandria
- Nonresidential Building Operators, Alexandria
- North American Restaurants, Alexandria
- Notary Public, Alexandria
- Novelty Gifts & Items Stores, Alexandria
- Novelty, Souvenir & Gift Shops, Alexandria
- Nurseries & Garden Centers, Alexandria
- Nurses, Alexandria
- Nurses Private Duty, Alexandria
- Nurses Registered, Alexandria
- Nursing & Life Care Homes, Alexandria
- Nursing Homes, Alexandria - Skilled Nursing Facility - Personal Care Centers
- Nutritionists & Nutrition Consultants, Alexandria - Nutrition Centers
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