| CCSD | Caledonia Centre for Social Development 
| Others |
| CCSD | Calgary Catholic School District
| Others |
| CCSD | California College San Diego
| Others |
| CCSD | Camaro Club of San Diego
| Others |
| CCSD | Cambria Community Service District
| Others |
| CCSD | Cambria Community Services District
| Others |
| CCSD | Camden City School District
| Others |
| CCSD | Campbell County School District
| Others |
| CCSD | Canadian Council on Social Development
| Others |
| CCSD | Carmel Central School District
| Others |
| CCSD | Cellular Circuit Switched Data
| Others |
| CCSD | Center for Counseling and Student Development
| Others |
| CCSD | Center for Sustainable Suburban Development
| Others |
| CCSD | Center on Conflict Security and Development
| Others |
| CCSD | Central Columbia School District
| Others |
| CCSD | Central Consolidated School District
| Others |
| CCSD | Central Curry School District
| Others |
| CCSD | Chappaqua Central School District
| Others |
| CCSD | Charleston County School District
| Others |
| CCSD | Cherokee Community School District
| Others |
| CCSD | Cherry Creek School District
| Others |
| CCSD | Child Support Services Division
| Others |
| CCSD | Chillicothe City School District
| Others |
| CCSD | Christian Cooperating School Districts
| Others |
| CCSD | Clark County School District
| Others |
| CCSD | Clarke County School District
| Others |
| CCSD | Clarkstown Central School District
| Others |
| CCSD | Clinical Coding Schedule Development
| Others |
| CCSD | Coahoma County School District
| Others |
| CCSD | Cobb County School District
| Others |
| CCSD | Command Communications Service Designator
| Others |
| CCSD | Common Constraint Situation Display
| Others |
| CCSD | Community Consolidated School District
| Others |
| CCSD | Complex Carbohydrate Structure Database
| Others |
| CCSD | Congregatio Catolica Sine Dogma
| Others |
| CCSD | Connoisseur's Club of Smoking and Drinking
| Others |
| CCSD | Coupled Cluster Singles and Doubles
| Others |
| CCSD | CUNY Coalition for Students with Disabilities
| Others |
| CCSD | Cycling Camp San Diego
| Others |