- Eaves Troughs, Welland
- Education, Welland
- Educators, Welland
- Electric Companies, Welland
- Electric Motor Repair & Service, Welland
- Electric Motors & Generators , Welland
- Electrical Control Systems & Materials, Welland
- Electrical Supplies, Parts & Equipment, Welland - Wholesale & Manufacturers
- Electricians, Welland - Electrical Contractors
- Electrolysis Treatments, Welland
- Electronics Repair & Maintenance , Welland
- Electronics Stores, Welland
- Elementary Schools, Welland
- Embossing, Stamping & Engraving, Welland
- Embroidery, Welland
- Emergency Services, Welland
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- Emergency Victim Services, Welland
- Emissions Testing, Welland - Smog Check
- Employee Counseling Services, Welland
- Employment Agencies, Welland - Staffing Agencies
- Employment Agencies General Labor, Welland
- Employment Assistance, Welland
- Energy Services, Welland
- Engineer & Architect Services, Welland - Engineering & Architecture Service
- Entertainment & Recreation, Welland
- Environmental Products, Welland
- Environmental Products & Services, Welland
- Ethnic Churches, Welland
- Ethnic Food Stores, Welland
- European Cuisine, Welland
- Excavation Contractors, Welland - Excavating - Excavator Companies
- Excavation Equipment, Welland - Excavating & Ditching Equipment
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