| Cayuga County, NY (ISD) |
| Cayuga ISD, TX (District) |
| Cayuga-Onondaga Boces, NY (ISD) |
| Cayuse Prairie Elem, MT (District) |
| Cazenovia Central School District, NY (District) |
| CCSD 146, IL (District) |
| CCSD 168, IL (District) |
| CCSD 180, IL (District) |
| CCSD 204, IL (District) |
| CCSD 62, IL (District) |
| CCSD 89, IL (District) |
| CCSD 93, IL (District) |
| Cecil County, MD (ISD) |
| Cecil County Public Schools, MD (District) |
| Cedar Bluffs Public Schools, NE (District) |
