| College of Coastal Georgia | Academic & Science |
| College of Coastal Georgia Admissions | Academic & Science |
| College of Coastal Georgia's | Academic & Science |
| College of Coastal Georgia Athletics | Academic & Science |
| Conway County Genealogical Association (Arkansas) | Academic & Science |
| Center for Contemporary Graphic Art (Japan) | Academic & Science |
| Columbia Commercial General Agency | Business |
| California Citrus Growers Association | Community |
| Christian Community Golf Association | Community |
| Coordinating Committee on Graduate Affairs | Community |
| Color Craft Graphic Arts | Community |
| Collegiate Cattle Growers Association | Community |
| Cape Cod Cranberry Growers' Association | Community |
| California Cotton Growers Association | Community |
| Colorado Corn Growers Association | Community |
| California Cotton Ginners Association | Community |
| Chicago Community Gardeners Association | Community |
| Cornwall Commonwealth Games Association | Community |
| Christchurch Community Gardens Association (New Zealand) | Community |
| Case Control Genetic Association | Community |
| Carolina Computer Gaming Association | Computing |
| Ceramic Column Grid Array | Computing |
| Creative Coding Through Games and Apps | Computing |
| Changing Course in Global Agriculture | General |
| China Customs General Administration | General |
| Chess and Cards Game Admin (game hosting program) | General |
| Chicago Council on Global Affairs | Governmental |
| Canadian Coast Guard Auxiliary | Regional |
| Canadian Canola Growers Association | Regional |
| Collegiate Club Golf Association | Sports |
