- Carquest Auto Parts
- Carriage Auto Sales
- Carter Lumber
- Casalandra Metal Stamping Co
- Cascade Auto Sales
- Cascade Auto Wrecking Inc
- Cascade Development
- Cascade Express
- Cascade Express
- Cascavilla Computer Svc
- Casimir Pulaski Beneficial Clb
- Castle Builders Supply
- Castle Compu Systems
- Castle Driving School
- Castle Electric
- Castle Environmental Inc
- Castle Environmental Inc
- Castle Fence Co
- Castle Heating & Air Cond Inc
- Castle Management Corp
- Castle Mold & Tool Co Inc
- Castle Pistol Club
