- Back Care Products, Oakland
- Bagels, Oakland
- Baked Goods, Snacks & Sweets, Oakland
- Bakeries, Oakland
- Baking Supplies & Needs, Oakland - Flavoring Extracts, Flour & More
- Banks, Oakland
- Banquet Halls, Oakland
- Baptist Churches, Oakland
- Barber Shops, Oakland
- Barbers, Oakland
- Bars & Grills, Oakland
- Beauty Salons, Oakland
- Bedroom Furniture Stores, Oakland - Master & Kids Bedroom Furniture Sets & Beds
- Beer & Wine Stores, Oakland
- Belting & Belting Supplies Wholesale, Oakland
- Belting Supplies & Equipment, Oakland
- Beverage & Juice Bottlers Manufacturers, Oakland
- Beverage Non-Alcoholic Manufacturers, Oakland
- Beverage Stores, Oakland
- Bicycle Rentals, Oakland - Bike Rental
- Bicycle Repair & Service, Oakland - Bike Repair Shops
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- Bistros, Oakland
- Bottling Manufacturing, Oakland
- Bowling Centers, Oakland
- Boy Scouts Of America, Oakland
- Breakfast Restaurants, Oakland
- Brick Masonry & Bricklayer Contractors, Oakland - Brick Mason - Install & Repair
- Builders & Contractors, Oakland
- Builders & Contractors - More, Oakland
- Building & Home Inspection, Oakland - Real Estate, Building, Land & House Inspection Service
- Building Construction Consultants, Oakland - Construction Management & Consulting
- Building Materials, Oakland - Wholesale, Manufacturers, Dealers & Suppliers
- Building Materials & Supplies, Oakland
- Burglar & Alarm Service, Oakland - Monitoring Service
- Burglar Alarm Systems, Oakland
- Business & Professional Associations, Oakland
- Business Insurance, Oakland
- Business Legal Services, Oakland
- Business Management Consultants, Oakland
- Business Services, Oakland
- Business, Vocational & Technical, Oakland
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