| Cliff Park High School, OH (PSA) |
| Cliffside Park School DIstrict, NJ (District) |
| Clifton ISD, TX (District) |
| Clifton Public Schools, NJ (District) |
| Clifton Unified District, AZ (District) |
| Clifton-Clyde, KS (District) |
| 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, OK (District) |
| Clinton, MA (District) |
