- Cable Conduit & Pole Contractors, Wellesley
- Car Detailing & Wash Service, Wellesley - Auto Detailing
- Car Wash, Cleaning, Wax & Polish Service, Wellesley
- Carpenters, Wellesley - Carpentry Contractors
- Casual Dining Restaurants, Wellesley
- Chambers Of Commerce, Wellesley
- Child Care & Day Care Services, Wellesley
- Chiropractor, Wellesley
- Christian Churches, Wellesley
- Churches 1 Of 3, Wellesley
- City & County Government, Wellesley
- Cleaning Supplies & Products, Wellesley
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- Clinics, Wellesley
- CNC Machine Shop, Wellesley
- Colleges & Universities, Wellesley
- Communications Cable Contractors, Wellesley
- Community Services, Wellesley
- Concrete Contractors, Wellesley - Concrete Construction & Concrete Companies
- Condiments & Sauces, Wellesley
- Construction, Wellesley
- Construction Companies, Wellesley
- Consultants & Services, Wellesley
- Convention & Meeting Facilities, Wellesley - Meeting Rooms
- Crane Rental & Leasing, Wellesley
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