- Cafe Restaurants, Barrington
- Candy, Nut & Confectionery Wholesale & Retail, Barrington - Candy Stores
- Carpet, Rug & Linoleum Flooring Dealers, Barrington
- Cash Registers & Supplies, Barrington
- Casual Dining Restaurants, Barrington
- Caterers Food Services, Barrington
- Catholic Churches, Barrington
- Cellular & Mobile Phone Service, Barrington
- Chemical Products, Barrington - Chemical Distributors, Dealers, Wholesale, etc
- Child Care & Day Care Services, Barrington
- Child Related Social Services, Barrington
- Children's Clothing Stores, Barrington - Infant, Babies & Kids Clothing
- Childrens After School Programs, Barrington
- Chiropractor, Barrington
- Christian Churches, Barrington
- Church Of Christ, Barrington
- Churches 1 Of 3, Barrington
- Churches 3 Of 3, Barrington
- Cigar, Cigarette & Tobacco Store & Supplies, Barrington
- City & County Government, Barrington
- City & County Law Enforcement, Barrington
- Clock & Watch Stores, Barrington
- Clothing & Accessories Resale & Consignment Shops, Barrington
- Clothing Stores, Barrington - Clothes & Accessories
- CNC Machine Shop, Barrington
- Coffee, Barrington
- Coffee, Espresso & Tea House Restaurants, Barrington
- Color & Style Consultants, Barrington
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- Commercial Equipment, Barrington
- Communications Services, Barrington
- Community & Recreational Facilities, Barrington
- Community Services, Barrington
- Computer & Software Stores, Barrington
- Computer Repair, Barrington
- Computer Software & Services, Barrington
- Computer Software Service, Barrington
- Congregational Church, Barrington
- Construction, Barrington
- Construction Companies, Barrington
- Construction Estimators, Barrington
- Construction Services, Barrington
- Consultants & Services, Barrington
- Contractors Equipment & Supplies - Rental & Leasing, Barrington
- Convenience Stores, Barrington
- Convention Services - Other, Barrington
- Convents & Monasteries, Barrington
- Copyright, Patent & Trademark Attorneys & Lawyers, Barrington
- Copyright, Patent & Trademark Attorneys & Lawyers, Barrington
- Copyright, Patent & Trademark Lawyers & Attorneys, Barrington
- Counseling Professionals, Barrington
- Counseling Services, Barrington
- Country Clubs, Barrington
- County Police, Barrington
- Curtains, Drapes & Window Treatments and Coverings, Barrington - Drapery & Upholstery Fabric Stores
- Custom Sewing & Alterations, Barrington
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