- Nail Salons, Findlay
- National Government, Findlay
- National Military, Findlay
- National Security, Findlay
- Needlework & Needlework Supplies & Materials, Findlay
- Nephrologists, Findlay - Kidney Doctors, Physicians & Surgeons (Nephrology)
- Network Communications, Findlay
- Network Designers, Findlay - Computer Networking Design & Systems
- Neurologists, Findlay - Neurology Doctors, Physicians & Surgeons
- Neuropathic Pain Doctors, Findlay - Neuropathy Physicians & Surgeons
- Newsletter Publishers, Findlay
- Newspaper Manufacturers, Findlay
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- Newspaper Publishing & Printing, Findlay
- Night Clubs, Findlay - Nightclub & Night Life
- Non-Denominational Churches, Findlay
- Noncommercial Social Research Organization, Findlay
- Nonresidential Building Operators, Findlay
- North American Restaurants, Findlay
- Notary Public, Findlay
- Nurse Practitioners, Findlay
- Nurseries & Garden Centers, Findlay
- Nurses, Findlay
- Nursing Homes, Findlay - Skilled Nursing Facility - Personal Care Centers
- Nutritionists & Nutrition Consultants, Findlay - Nutrition Centers
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