| Corcoran Joint Unified, CA (District) |
| Cordell, OK (District) |
| Cordova City School District, AK (District) |
| Corinth Central School District, NY (District) |
| Corinth School Dist, MS (District) |
| Cornell CCSD 426, IL (District) |
| Cornell School District, WI (District) |
| Cornell SD, PA (District) |
| Cornerstone Academy Community School, OH (PSA) |
| Cornerstone Charter School Inc, AZ (PSA) |
| Cornerstone Health and Technology School, MI (PSA) |
| Cornerstone Jefferson-Douglass Academy, MI (PSA) |
| Cornerstone Montessori Elementary, MN (District) |
| Corning City School District, NY (District) |
| Corning Comm School District, IA (District) |
