- Cafe Restaurants, Sumas
- Campgrounds, Sumas
- Casual Dining Restaurants, Sumas
- Central American Restaurants, Sumas
- Chambers Of Commerce, Sumas
- Child Related Social Services, Sumas
- Chinese Restaurants, Sumas
- Christian Churches, Sumas
- Churches 1 Of 3, Sumas
- City & County Administrative Agencies, Sumas
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- City & County Government, Sumas
- Communications Consultants, Sumas
- Community Services, Sumas
- Computer & Audio Visual Services, Sumas
- Computer Services, Sumas
- Construction, Sumas
- Construction Services, Sumas
- Consultants & Services, Sumas
- Convenience Stores, Sumas
- Convention & Meeting Facilities, Sumas - Meeting Rooms
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