| Cascade Union Elementary, CA (District) |
| Case Preparatory Academy, OH (PSA) |
| Caseville Public Schools, MI (District) |
| Casey County, KY (Phantom) |
| Casey County Schools, KY (District) |
| Casey-Westfield CUSD 4C, IL (District) |
| Cashion, OK (District) |
| Cashmere School District, WA (District) |
| Cashton School District, WI (District) |
| Casman Alternative Academy, MI (PSA) |
| Cass City Public Schools, MI (District) |
| Cass County, ND (ISD) |
| Cass County, NE (ISD) |
| Cass County, IA (ISD) |
| Cass County, TX (ISD) |
