| Clarkton C-4, MO (District) |
| Classical Academy Charter School of Clifton, NJ (District) |
| Clatskanie Sd 6J, OR (District) |
| Clatsop County, OR (ISD) |
| Claude ISD, TX (District) |
| Clawson Public Schools, MI (District) |
| Clay, FL (District) |
| Clay Avenue Community School, OH (PSA) |
| Clay Center, KS (District) |
| Clay Central-Everly Comm School District, IA (District) |
| Clay City CUSD 10, IL (District) |
| Clay Co School Dist, MS (District) |
| Clay Community Schools, IN (District) |
| Clay County, IN (ISD) |
| Clay County, GA (ISD) |
