| Critical Care Societies Collaborative | Academic & Science |
| Cheung Chuk Shan College | Academic & Science |
| Cesar Chavez Student Center | Academic & Science |
| Consortium of Computer Science Colleges | Academic & Science |
| Canon City Spur Company | Business |
| Community Charter School of Cambridge | Community |
| Christian Community Service Center | Community |
| Community Counseling Services Center | Community |
| Clarksville Community School Corporation | Community |
| Church of Christ Student Center | Community |
| Caesar Creek Soaring Club | Community |
| Community Culinary School of Charlotte | Community |
| Curious Cat Spy Club | Community |
| Crawfordsville Community School Corporation | Community |
| Crystal Community Ski Club | Community |
| California Center for Sustainable Communities | Community |
| Congregational Christian Service Committee | Community |
| Clearwater Community Sailing Center | Community |
| Central California Soaring Club | Community |
| Community Council of Senior Citizens | Community |
| Catholic Church Student Center | Community |
| Commercial Computer Security Centre | Computing |
| Computer Combat Simulation Club | Computing |
| Certified Cloud Security Consultant | Computing |
| Cyprus Cyber Security Challenge | Computing |
| Christ Central of Southern California | General |
| Cape Cod Sea Camps | General |
| Charge Card Service Center | General |
| Coalition for Current Safety Codes | General |
| Collaborations for Commercial Space Capabilities | General |
| Consortium for Computing Sciences in Colleges | General |
| Cryptologic Combat Support Console | General |
| Cocoa Chocolate and Sugar Confectioner | General |
| Consumer Centered Services of Colorado | General |
| Cherry Creek Shopping Center | General |
| Cytometry and Cell Sorting Core | General |
| Comprehensive Care Sustainability Collaborative | General |
| Charge and Configuration Self Consistency | General |
| Classic Chevys of Southern California | General |
| Columbia College Student Council | Governmental |
| Cemetery Consumer Service Council | Governmental |
| Citi Commerce Solutions of Canada | Governmental |
| Comité Coordinador del Sector Civil | International |
| Canadian Cardiovascular Society Classification | Medical |
| Cardiovascular Society Classification | Medical |
| Central Consultants and Specialists Committee | Medical |
| Clay County Soccer Club | Sports |
| Chester County Skating Club | Sports |
| Central Carolina Soccer Club | Sports |
| Camille Chamoun Sports City | Sports |
| Century City Ski | Sports |
| Clark County Shooting Complex | Sports |
| Central Carolina Skating Club | Sports |
