- Ear & Body Piercing, Sarnia
- Eastern Orthodox Church, Sarnia
- Eaves Troughs, Sarnia
- Economic Development, Sarnia
- Education, Sarnia
- Education & Information Services, Sarnia
- Education Services, Sarnia
- Educational Facilities, Sarnia
- Educational Testing Services, Sarnia
- Educational, Philanthropic & Research Foundations, Sarnia
- Educators, Sarnia
- Eggs & Egg Products, Sarnia
- Eggs Wholesale, Sarnia
- Electric Companies, Sarnia
- Electric Instruments, Sarnia
- Electric Motor Repair & Service, Sarnia
- Electric Motors & Generators , Sarnia
- Electric Razors & Shavers, Sarnia
- Electric Shavers Repair, Sales, Service & Supplies, Sarnia
- Electrical Control Systems & Materials, Sarnia
- Electrical Goods, Sarnia
- Electrical Heating Systems, Sarnia
- Electrical Supplies, Parts & Equipment, Sarnia - Wholesale & Manufacturers
- Electricians, Sarnia - Electrical Contractors
- Electrolysis Treatments, Sarnia
- Electronic Repair Shops , Sarnia
- Electronics Manufacturers, Sarnia
- Electronics Repair & Maintenance , Sarnia
- Electronics Stores, Sarnia
- Elementary Schools, Sarnia
- Embossing, Stamping & Engraving, Sarnia
- Embroidery, Sarnia
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- Emergency Services, Sarnia
- Emergency Victim Services, Sarnia
- Emissions Testing, Sarnia - Smog Check
- Employee Benefit & Compensation Plans, Sarnia
- Employee Counseling Services, Sarnia
- Employment Agencies, Sarnia - Staffing Agencies
- Employment Agencies General Labor, Sarnia
- Employment Assistance, Sarnia
- Energy & Conservation Agencies, Sarnia
- Energy Conservation Consultants, Sarnia
- Energy Services, Sarnia
- Engine Rebuild, Repair & Exchange, Sarnia
- Engineer & Architect Services, Sarnia - Engineering & Architecture Service
- Engineering Consultants, Sarnia - Consulting Engineers
- English Restaurants, Sarnia
- Entertainers & Groups, Sarnia
- Entertainment & Recreation, Sarnia
- Entertainment Consultants, Sarnia
- Entertainment Services, Sarnia
- Environmental Consultants, Sarnia - Ecological Consulting
- Environmental Engineers, Sarnia
- Environmental Products, Sarnia
- Environmental Products & Services, Sarnia
- Environmental Services, Sarnia
- Erosion Control, Sarnia
- Ethnic Food Stores, Sarnia
- European Cuisine, Sarnia
- Evangelical Church, Sarnia
- Excavation Contractors, Sarnia - Excavating - Excavator Companies
- Exercise Equipment Stores, Sarnia - Fitness & Gym Equipment
- Exporters, Sarnia
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