| Cory-Rawson Local School District, OH (District) |
| Coryell County, TX (ISD) |
| Coshocton City School District, OH (District) |
| Coshocton County Career Center, OH (District) |
| Coshocton County JVSD CTPD, OH (District) |
| Coshocton Opportunity School, OH (PSA) |
| Cosmopolis School District, WA (District) |
| Cossatot River School District, AR (District) |
| Costilla County, CO (ISD) |
| Cotati-Rohnert Park Unified, CA (District) |
| Cotopaxi Re-3, CO (District) |
| Cotter School District, AR (District) |
| Cottle County, TX (ISD) |
| Cotton Center ISD, TX (District) |
| Cotton County, OK (ISD) |
