- Warehousing & Storage, Northport - Warehouse Services
- Washing Machine Sales, Service & Repair, Northport - Washers
- Watch, Clock & Jewelry Repair, Northport
- Water Purification Consultants, Northport
- Water Transportation, Except Passenger, Northport
- Water Treatment & Conditioning Systems, Equipment & Supplies, Northport - Water Softener Companies
- Water, Sewer & Utility Line Contractors, Northport - Installation & Repair Services
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- Website Design, Management & Maintenance Services, Northport
- Wedding Dresses & Bridal Gowns, Northport
- Weight Loss & Control Programs, Northport
- Window Blinds, Shades & Window Treatments and Coverings, Northport - Roller & Roman Shades - Wood, Metal & Vertical Blinds
- Wireless & Cellular Communications Equipment & Supplies, Northport
- Women s Clothing Stores, Northport - Clothes & Accessories
- Woodworking Contractors, Northport - Carpentry Contractors
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