| Cincinnati College Preparatory Academy | Academic & Science |
| College of Community and Public Affairs | Academic & Science |
| Capital College Preparatory Academy | Academic & Science |
| Cellebrite Certified Physical Analyst | Business |
| Center for Career and Professional Advising | Business |
| Court of Customs and Patent Appeals | Business |
| Canadian Certified Physician Assistant | Business |
| Children's Community Physicians Association | Business |
| Canadian Colombian Professional Association | Business |
| Colorado Council of Professional Archaeologists | Business |
| Central Coast Paralegal Association | Business |
| Cemented Carbide Producers Association | Business |
| Council of Content Providers and Aggregators | Business |
| Coalition for Community Pharmacy Action | Business |
| Consultative Committee of Plantation Associations | Business |
| China Clay Producers Association | Business |
| Collin County Psychological Association | Business |
| Credit Card Processing Association | Business |
| Center City Proprietors Association | Community |
| Chinese Catholic Patriotic Association | Community |
| Covina Center for the Performing Arts | Community |
| Canadian Centre for Policy Alternatives | Community |
| Chicago College of Performing Arts | Community |
| Canadian College of Performing Arts | Community |
| Christian College Preparatory Academy | Community |
| Childhood Cancer Parents Alliance | Community |
| Coliseum College Prep Academy | Community |
| Cerritos Center for the Performing Arts | Community |
| Chicago Center for the Performing Arts | Community |
| Clarkston Center for the Performing Arts | Community |
| Covedale Center for the Performing Arts | Community |
| Cades Cove Preservation Association | Community |
| Coherence Conditional Probabilistic Assessment | General |
| Corporate Communication and Public Affairs | General |
| California Canning Peach Association | General |
| Catabolite control protein A | General |
| Consumer Credit Protection Act | Governmental |
| California Consumer Privacy Act | Governmental |
| Consumer Protection Credit Act | Governmental |
| Columbiana County Port Authority | Governmental |
| Charlotte Cooperative Purchasing Alliance | Governmental |
| Centro Cultural Paraguayo Americano | International |
| Centre Canadien du Patrimoine Aéronautique | International |
| Communauté de Communes du Pays de l'Arbresle | International |
| Canadian Chemical Producers Association | Regional |
| Cross Cultures Project Association | Sports |
