- CertiLearn
- CFA Institute
- Chamber of Commerce of Smyth County, Virginia
- Charles A. Wilson and Associates
- Chesapeake Bagel Bakery - All stores
- Chesapeake Conference Center
- Chesapeake Conv + Tourism
- Chesapeake Regional Hospital
- Chesapeake Regional Medical Center
- Chester-Richmond - Fairfield Inn by Marriott, VA
- Chesterfield County
- Children's Hospital of Richmond at VCU
- Children's Hospital of The King's Daughters
- CHIP of Greater Richmond
- Chippenham Hospital
- City of Alexandria, VA
- City of Richmond
- Clancy and Theys Construction Company
- Claude Mansfield Sutton
- Clear Channel Communications
- Clinch Valley Medical Center
- Cobb Technologies
- Colonial Williamsburg Hotel Company
- Colortree Inc. of Virginia
- Columbia Gas of Virginia Inc.
- Comfort Inn, Gloucester
- Comfort Inn, Springfield
- Comfort Suites, Chesapeake
- Commonwealth Bank
- Community Anti-Drug Coalitions of America
- Community Association Institute
- Community Financial Services Association of America
- Compass Technology Management
- Complete Catering
- Conference Direct
- Conferon, Inc.
- Congressional Institute Incorporated
- Connects Federal Credit Union
- Conotti Corporation
- Consolation Reunion Committee, Inc.
- Consolidated Bank and Trust co.
- Consolidated Cigar Company
- Construction Specifications Institute
- Consumer Electronics Association
- Contract Chemicals, Inc.
- Control Corporation of America
- Convenience Distribution Association
- Convention Industry Council
- County of Prince George
- Courtyard by Marriott, Chesapeake