| Clarkstown Central School District, NY (District) |
| Clarksville Com School Corp, IN (District) |
| Clarksville Comm School District, IA (District) |
| Clarksville ISD, TX (District) |
| Clarksville School District, AR (District) |
| Clarksville School District, NH (District) |
| 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) |
