| Clifton-fine Central School District, NY (District) |
| Climax Springs R-Iv, MO (District) |
| Climax-Scotts Community Schools, MI (District) |
| Climax-Shelly Public Schools, MN (District) |
| Clinch County, GA (ISD) |
| Clinch County, GA (District) |
| Clint ISD, TX (District) |
| Clinton, TN (District) |
| Clinton, MA (District) |
| Clinton, OK (District) |
| Clinton, MO (District) |
| Clinton Central School Corp, IN (District) |
| Clinton Central School District, NY (District) |
| Clinton City Schools, NC (District) |
| Clinton Co. R-Iii, MO (District) |
