| Cortland City School District, NY (District) |
| Cortland County, NY (ISD) |
| Corunna Public Schools, MI (District) |
| Corvallis K-12 Schools, MT (District) |
| Corvallis Sd 509J, OR (District) |
| Corwith-Wesley Comm School District, IA (District) |
| 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) |
