- Canvas Goods & Products, Oakville
- Cars, Truck, Van & SUV Car Dealerships, Oakville - Auto Dealers
- Casual Dining Restaurants, Oakville
- Caterers Food Services, Oakville
- Catholic Churches, Oakville
- Child Care & Day Care Services, Oakville
- Churches 1 Of 3, Oakville
- City & County Government, Oakville
- CNC Machine Shop, Oakville
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- Community Services, Oakville
- Computer & Laptop Repair, Oakville - PC Repair Services
- Computer Repair, Oakville
- Concrete Contractors, Oakville - Concrete Construction & Concrete Companies
- Construction, Oakville
- Construction Services, Oakville
- Consultants & Services, Oakville
- Convenience Stores, Oakville
- Cremation Services, Supplies & Equipment, Oakville
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