- Ear & Body Piercing, Castro Valley
- Eastern Orthodox Church, Castro Valley
- Education, Castro Valley
- Education Services, Castro Valley
- Education Technology, Castro Valley
- Educational Consultants, Castro Valley
- Educational Facilities, Castro Valley
- Educational Testing Services, Castro Valley
- Educators, Castro Valley
- Elder Care, Castro Valley
- Electric Companies, Castro Valley
- Electricians, Castro Valley - Electrical Contractors
- Electrolysis Treatments, Castro Valley
- Electronic Commerce - Internet Services, Castro Valley - E-Commerce Shopping
- Electronics Stores, Castro Valley
- Elementary Schools, Castro Valley
- Embossing, Stamping & Engraving, Castro Valley
- Embroidery, Castro Valley
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- Emergency Services, Castro Valley
- Employee Benefit & Compensation Plans, Castro Valley
- Employment Agencies, Castro Valley - Staffing Agencies
- Employment Assistance, Castro Valley
- Engineer & Architect Services, Castro Valley - Engineering & Architecture Service
- Engraving & Platemaking, Castro Valley
- Engraving - Wood, Plastic, Jewelry, Etc, Castro Valley - Engraver
- Entertainers & Groups, Castro Valley
- Entertainment & Recreation, Castro Valley
- Entertainment Services, Castro Valley
- Episcopal Churches, Castro Valley
- Escrow Service, Castro Valley
- Estate And Property Attorneys & Lawyers, Castro Valley
- Estate And Property Attorneys & Lawyers, Castro Valley
- Estate And Property Lawyers & Attorneys, Castro Valley
- Ethnic Goods & Products Stores, Castro Valley
- European Cuisine, Castro Valley
- Excavation Contractors, Castro Valley - Excavating - Excavator Companies
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