- Nail Salons, Brea
- National Government, Brea
- National Military, Brea
- National Security, Brea
- Natural Resource Attorneys & Lawyers, Brea
- Natural Resource Attorneys & Lawyers, Brea
- Natural Resource Lawyers & Attorneys, Brea
- Naturalizer Shoes, Brea
- Navigation & Guidance Systems & Instruments, Brea
- Network Communications, Brea
- Network Designers, Brea - Computer Networking Design & Systems
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- Non Durable Goods & Products, Brea
- Non-Denominational Churches, Brea
- Nonresidential Building Operators, Brea
- North American Restaurants, Brea
- Notary Public, Brea
- Nurseries & Garden Centers, Brea
- Nurses, Brea
- Nurses Registered, Brea
- Nursing & Life Care Homes, Brea
- Nursing Homes, Brea - Skilled Nursing Facility - Personal Care Centers
- Nutrition Centers, Brea - Nutrition Specialists
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