- Cable TV Companies & Services, Petersburg
- Campgrounds, Petersburg
- Carpet Rug & Upholstery Cleaners, Petersburg
- Casual Dining Restaurants, Petersburg
- Church Of God, Petersburg
- Churches 1 Of 3, Petersburg
- Churches 2 Of 3, Petersburg
- City & County Administrative Agencies, Petersburg
- City & County Government, Petersburg
- Cleaning & Maintenance Services, Petersburg
- Cleaning & Restoration Contractors, Including Sandblasting, Petersburg
- Clergy, Petersburg
- CNC Machine Shop, Petersburg
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- Collectibles, Petersburg
- Communications Services, Petersburg
- Community Services, Petersburg
- Computer & Audio Visual Services, Petersburg
- Construction, Petersburg
- Construction Equipment Rental & Leasing, Petersburg
- Construction Services, Petersburg
- Consultants & Services, Petersburg
- Convention & Meeting Facilities, Petersburg - Meeting Rooms
- Crane Services, Petersburg
- Cranes & Derricks, Petersburg
- Cranes Hoisting & Rigging Service, Petersburg - Crane Rental Service
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