- Ear & Body Piercing, East Northport
- Education, East Northport
- Education Services, East Northport
- Educational Consultants, East Northport
- Educational Testing Services, East Northport
- Educators, East Northport
- Electrical Representatives, East Northport
- Electrical Supplies, Parts & Equipment, East Northport - Wholesale & Manufacturers
- Electricians, East Northport - Electrical Contractors
- Electronics Manufacturers, East Northport
- Electronics Repair & Maintenance , East Northport
- Electronics Stores, East Northport
- Elementary Schools, East Northport
- Embroidery, East Northport
- Emergency Rooms, East Northport - Urgent Care Centers
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- Emergency Services, East Northport
- Employment Agencies, East Northport - Staffing Agencies
- Engineer & Architect Services, East Northport - Engineering & Architecture Service
- Engineering Consultants, East Northport - Consulting Engineers
- Entertainment & Recreation, East Northport
- Entertainment Consultants, East Northport
- Environmental Groups, East Northport
- Equipment Installation Contractors, East Northport
- Estate And Property Attorneys & Lawyers, East Northport
- Estate And Property Attorneys & Lawyers, East Northport
- Estate And Property Lawyers & Attorneys, East Northport
- European Cuisine, East Northport
- Evangelical Church, East Northport
- Excavation Contractors, East Northport - Excavating - Excavator Companies
- Exporters, East Northport
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