- Cafe Restaurants, Ritzville
- Cars, Truck, Van & SUV Car Dealerships, Ritzville - Auto Dealers
- Casual Dining Restaurants, Ritzville
- Caterers Food Services, Ritzville
- Catholic Churches, Ritzville
- Central American Restaurants, Ritzville
- Chambers Of Commerce, Ritzville
- Chiropractor, Ritzville
- Christian Churches, Ritzville
- Church Of Christ, Ritzville
- Church Of Jesus Christ Of Latter Day Saints, Ritzville
- Church Of The Nazarene, Ritzville
- Churches 1 Of 3, Ritzville
- Churches 2 Of 3, Ritzville
- City & County Administrative Agencies, Ritzville
- City & County Government, Ritzville
- City & County Law Enforcement, Ritzville
- Clinics, Ritzville
- Clock Repair, Ritzville
- CNC Machine Shop, Ritzville
- Coffee & Tea Stores, Ritzville
- Coffee, Espresso & Tea House Restaurants, Ritzville
- Commodity & Merchandise Storage & Warehouse, Ritzville - Warehousing
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- Communications Services, Ritzville
- Community & Recreational Facilities, Ritzville
- Community Services, Ritzville
- Computer & Laptop Repair, Ritzville - PC Repair Services
- Computer & Software Stores, Ritzville
- Computer Repair, Ritzville
- Computer Software & Services, Ritzville
- Construction, Ritzville
- Construction Companies, Ritzville
- Consultants & Services, Ritzville
- Contractor Equipment & Supplies, Ritzville - Construction Equipment & Machinery
- Convenience Stores, Ritzville
- Counseling Services, Ritzville
- Country Cooking Restaurants, Ritzville
- County Police, Ritzville
- Credit Unions, Ritzville
- Cremation Services, Supplies & Equipment, Ritzville
- Crop Packing & Handling, Ritzville
- Crop Planting & Protecting, Ritzville - Soil Preparation & Cultivating
- Crop Preparation For Market, Ritzville
- Crop Processing, Ritzville
- Crop Shipping, Ritzville
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