| Claymont City School District, OH (District) |
| Claysburg Kimmel SD, PA (District) |
| Clayton, MO (District) |
| Clayton, OK (District) |
| Clayton County, GA (District) |
| Clayton County, GA (ISD) |
| Clayton County, IA (ISD) |
| Clayton Municipal Schools, NM (District) |
| CLAYTON PUBLIC SCHOOLS, NJ (District) |
| Clayton Ridge Comm School District, IA (District) |
| Clayton School District, WI (District) |
| Cle Elum-Roslyn School District, WA (District) |
| Clear Creek Amana Comm School District, IA (District) |
| Clear Creek County, CO (ISD) |
| Clear Creek Elementary, CA (District) |
