- Cabins Cottages & Chalet Rental, Oakland
- Campgrounds, Oakland
- Canoe & Kayak Rental, Oakland
- Canoes & Kayaks, Oakland - Equipment, Gear, PFD, Paddles & Accessories
- Canvas Goods & Products, Oakland
- Car Rental, Oakland - Rental Cars & Lease Service
- Cardiologists, Oakland - Heart Doctors, Physicians & Surgeons (Cardiology)
- Cars, Truck, Van & SUV Car Dealerships, Oakland - Auto Dealers
- Casual Dining Restaurants, Oakland
- Catholic Churches, Oakland
- Chiropractor, Oakland
- City & County Government, Oakland
- Clinics, Oakland
- Clothing & Accessories Resale & Consignment Shops, Oakland
- CNC Machine Shop, Oakland
- Commercial Equipment, Oakland
- Commercial Printing, Oakland
|
- Commercial Printing Manufacturers, Oakland
- Community Services, Oakland
- Computer Networks, Oakland - Design & Systems
- Concrete Contractors, Oakland - Concrete Construction & Concrete Companies
- Construction, Oakland
- Consultants & Services, Oakland
- Continuing Education, Oakland
- Contractors Equipment & Supplies - Rental & Leasing, Oakland
- Convenience Stores, Oakland
- Conveyor & Conveying Equipment, Oakland - Conveyor Belt
- Country Clubs, Oakland
- Crane Services, Oakland
- Cranes Hoisting & Rigging Service, Oakland - Crane Rental Service
- Credit Unions, Oakland
- Cremation Services, Supplies & Equipment, Oakland
- Custom Furniture, Oakland - Furniture Designers & Custom Builders
- Customer Service Representatives, Oakland
|
