- Nail Salons, Lake Oswego
- National Commercial Banks, Lake Oswego
- National Government, Lake Oswego
- Natural Health School, Lake Oswego
- Naturopathic Doctors, Lake Oswego - Naturopathic Medicine Physicians
- Network Communications, Lake Oswego
- Network Marketing, Lake Oswego
- Newspaper Manufacturers, Lake Oswego
- Noise Measuring Equipment, Lake Oswego
- Non-Denominational Churches, Lake Oswego
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