- Campers & Pick-Up Canopies Parts & Supplies, Mattawan
- Campers & Pick-Up Coaches Repair & Service, Mattawan
- Campgrounds, Mattawan
- Car Detailing & Wash Service, Mattawan - Auto Detailing
- Car Wash, Cleaning, Wax & Polish Service, Mattawan
- Carpet, Rug & Linoleum Flooring Dealers, Mattawan
- Cars, Truck, Van & SUV Car Dealerships, Mattawan - Auto Dealers
- Casual Dining Restaurants, Mattawan
- Catholic Churches, Mattawan
- Central American Restaurants, Mattawan
- Chemical Products, Mattawan - Chemical Distributors, Dealers, Wholesale, etc
- Chemicals Agricultural, Mattawan
- Child Care & Day Care Services, Mattawan
- Child Related Social Services, Mattawan
- Chiropractor, Mattawan
- Christian Churches, Mattawan
- Church Of Christ, Mattawan
- Churches 1 Of 3, Mattawan
- City & County Government, Mattawan
- City & County Law Enforcement, Mattawan
- Clinics, Mattawan
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- CNC Machine Shop, Mattawan
- Coffee & Tea Stores, Mattawan
- Coffee, Espresso & Tea House Restaurants, Mattawan
- Coin Operated Machines & Equipment, Mattawan
- Commercial Equipment, Mattawan
- Commercial Physical Research, Mattawan
- Commodity & Merchandise Storage & Warehouse, Mattawan - Warehousing
- Community & Recreational Facilities, Mattawan
- Community Church, Mattawan
- Community Churches, Mattawan
- Community Services, Mattawan
- Concrete Contractors, Mattawan - Concrete Construction & Concrete Companies
- Concrete Handling Services, Mattawan - Concrete Pumping
- Congregational Church, Mattawan
- Construction, Mattawan
- Consultants & Services, Mattawan
- Convenience Stores, Mattawan
- Cooking, Food & Beverage Equipment, Mattawan
- County Police, Mattawan
- Credit Unions, Mattawan
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