- Nail Salons, Wallingford
- National Government, Wallingford
- Naturopathic Doctors, Wallingford - Naturopathic Medicine Physicians
- Needlework & Needlework Supplies & Materials, Wallingford
- Network Designers, Wallingford - Computer Networking Design & Systems
- News Service, Wallingford - News Syndicates
- Newspaper Manufacturers, Wallingford
- Nickel Minerals & Ores, Wallingford
- Non Durable Goods & Products, Wallingford
- Non-Denominational Churches, Wallingford
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