| Canon City Public Library | Academic & Science |
| Cobb County Public Library | Academic & Science |
| Carroll County Public Library | Academic & Science |
| Calhoun County Public Library | Academic & Science |
| Chilton Clanton Public Library | Academic & Science |
| Clermont County Public Library | Academic & Science |
| Charles County Public Library | Academic & Science |
| Campbell County Public Library | Academic & Science |
| Clay County Public Library | Academic & Science |
| Charleston County Public Library | Academic & Science |
| Carmel Clay Public Library | Academic & Science |
| Clark County Public Library | Academic & Science |
| Chesterfield County Public Library | Academic & Science |
| Caldwell County Public Library | Academic & Science |
| Cecil County Public Library | Academic & Science |
| Crawford County Public Library | Academic & Science |
| Cariboo Chilcotin Partners for Literacy | Academic & Science |
| Columbia County Public Libraries | Academic & Science |
| Choksey Chemicals Pvt Ltd | Business |
| Community Church of Portage Lakes | Community |
| Canadian Centre for Political Leadership | Community |
| Creative Commons Public License | Computing |
| Cryogenic Capillary Pumped Loop | General |
| Capitol Corridor Pinball League | General |
| Central California Pistol League | General |
| Collier County Public Library | Regional |
| Cuyahoga County Public Library | Regional |
| Corporate Cricket Premier League | Sports |
